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240 Area Code

About Area Code 240

State: Maryland
Major City: Germantown
Timezone: Eastern
Current Time: 6:39pm
Short URL: allareacodes.com/240

Area Code 240 Map

Where is area code 240?

Area code 240 is located in western Maryland and covers Germantown, Silver Spring, Waldorf, Frederick, and Rockville. It is an overlay for area code 301 and serves the same area.

What time zone is area code 240?

The 240 area code is located in the Eastern timezone. The Eastern time zone is also known as America/New_York. As of the last time this page was loaded, the current time is 6:39pm.

History

Area code 240 was first put in service June 1, 1997. It was created from area code 301.

Nearby Area Codes

202 (District of Columbia)
223/717 (Lancaster, PA)
240/301 (Germantown, MD)
304/681 (West Virginia)
410/443/667 (Baltimore, MD)
434 (Lynchburg, VA)
484/610 (Allentown, PA)
540 (Roanoke, VA)
571/703 (Arlington, VA)
724 (New Castle, PA)
757 (Virginia Beach, VA)
804 (Richmond, VA)
814 (Erie, PA)
878 (Pittsburgh, PA)

Top 11 Counties in Area Code 240

CountyTotal Population
Montgomery, MD971,777
Prince George's, MD863,420
Frederick, MD233,385
Washington, MD147,430
Charles, MD146,551
St. Mary's, MD105,151
Allegany, MD75,087
Howard, MD287,085
Anne Arundel, MD537,656
Garrett, MD30,097
Calvert, MD88,737

Top 50 Cities in Area Code 240

CityTotal Population
Germantown, MD86,395
Silver Spring, MD71,452
Waldorf, MD67,752
Frederick, MD65,239
Rockville, MD61,209
Bethesda, MD60,858
Gaithersburg, MD59,933
Bowie, MD54,727
Aspen Hill, MD48,759
Wheaton, MD48,284
Potomac, MD44,965
North Bethesda, MD43,828
Hagerstown, MD39,662
Clinton, MD35,970
Olney, MD33,844
Chillum, MD33,513
Montgomery Village, MD32,032
College Park, MD30,413
South Laurel, MD26,112
Suitland, MD25,825
Laurel, MD25,115
North Potomac, MD24,410
Scaggsville, MD24,333
Fort Washington, MD23,717
Fairland, MD23,681
Landover, MD23,078
Greenbelt, MD23,068
Cumberland, MD20,859
Camp Springs, MD19,096
Langley Park, MD18,755
Ballenger Creek, MD18,274
Calverton, MD17,724
Oxon Hill, MD17,722
Hyattsville, MD17,557
White Oak, MD17,403
Seabrook, MD17,287
Glassmanor, MD17,295
Redland, MD17,242
Beltsville, MD16,772
Takoma Park, MD16,715
Hillcrest Heights, MD16,469
Maryland City, MD16,093
East Riverdale, MD15,509
Damascus, MD15,257
Cloverly, MD15,126
Adelphi, MD15,086
Colesville, MD14,647
Clarksburg, MD13,766
Glenmont, MD13,529
Glenn Dale, MD13,466

Largest Telephone Carriers

Landline

Prefixes Carrier
9%Verizon
6%Xo
5%Peerless Network
4%Global Crossing Local Services
4%Broadwing
3%Cavalier East
3%Cavalier Telephone Mid-atlantic
27%Other

Wireless

Prefixes Carrier
14%Sprint
9%Verizon Wireless
7%Cingular
4%Omnipoint Cap Operations
2%Cricket Comm
1%United States Cel Md
1%365 Wireless
1%Other

240 Area Code Prefixes

Assigned

Usage


Prefix
Usage
Primary City
Carrier
Introduced
(240) 200-
Landline
Mount Rainier
Bandwidth.com Clec
Introduced 10/04/2010
(240) 201-
Landline
Ridge
Peerless Network Of The District Of Columbia, DC
Introduced 07/22/1999
(240) 203-
Wireless
Hagerstown
Sprint Spectrum L.p.
Introduced 10/04/2011
(240) 204-
Wireless
Bethesda
Cellco Partnership DBA Verizon Wireless
Introduced 09/07/2011
(240) 205-
Wireless
Cabin John
New Cingular Wireless PCS - DC
Introduced 07/23/2003
(240) 206-
Landline
Glenn Dale
Xo Maryland
Introduced 10/31/2001
(240) 207-
Landline
Damascus
Cavalier East LLC
Introduced 08/20/2000
(240) 208-
Landline
La Plata
Peerless Network Of The District Of Columbia, DC
Introduced 07/22/1999
(240) 209-
Landline
Indian Head
Peerless Network Of The District Of Columbia, DC
Introduced 07/22/1999
(240) 210-
Wireless
Waldorf
New Cingular Wireless PCS - DC
Introduced 08/20/2000
(240) 212-
Landline
Oakland
Core Communications
Introduced 06/13/2000
(240) 213-
Landline
Waldorf
Peerless Network Of The District Of Columbia, DC
Introduced 07/22/1999
(240) 214-
Landline
Mechanicsville
Peerless Network Of The District Of Columbia, DC
Introduced 07/22/1999
(240) 215-
Landline
Frederick
Telcove Operations
Introduced 01/14/2000
(240) 216-
Wireless
Waldorf
Sprint Spectrum L.p.
Introduced 03/15/2001
(240) 217-
Wireless
Hagerstown
Omnipoint Communications Cap Operations
Introduced 04/16/2001
(240) 218-
Landline
Nanjemoy
Peerless Network Of The District Of Columbia, DC
Introduced 02/27/1999
(240) 220-
Landline
Poolesville
Peerless Network Of Maryland
Introduced 02/27/1999
(240) 221-
Landline
Rockville
Verizon Maryland
Introduced 05/10/1999
(240) 222-
Landline
Waldorf
Cavalier Telephone Mid-atlantic
Introduced 08/20/2000
(240) 223-
Landline
Mount Rainier
Allegiance Telecom
Introduced 02/27/1999
(240) 224-
Wireless
Gaithersburg
Cellco Partnership DBA Verizon Wireless
Introduced 09/10/2012
(240) 225-
Landline
Frederick
Core Communications
Introduced 06/13/2000
(240) 228-
Landline
Laurel
Verizon Maryland
Introduced 11/20/1998
(240) 229-
Landline
Waldorf
Broadwing Communications. LLC
Introduced 07/22/1999
(240) 230-
Landline
Hughesville
Global Crossing Local Services-md
Introduced 05/10/1999
(240) 231-
Landline
Hagerstown
Core Communications
Introduced 06/13/2000
(240) 232-
Landline
Mount Rainier
Broadwing Communications. LLC
Introduced 07/22/1999
(240) 233-
Landline
Newburg
Teleport Communications America - DC
Introduced 02/27/1999
(240) 234-
Wireless
Mount Rainier
Cellco Partnership DBA Verizon Wireless
Introduced 10/04/2011
(240) 235-
Landline
Bethesda
Paetec Communications
Introduced 10/13/1999
(240) 236-
Landline
Frederick
Verizon Maryland
Introduced 06/13/2000
(240) 237-
Landline
Callaway
Teleport Communications America - DC
Introduced 02/27/1999
(240) 238-
Landline
Rockville
Paetec Communications
Introduced 10/13/1999
(240) 239-
Landline
Leonardtown
Core Communications
Introduced 10/31/2000
(240) 241-
Landline
Chevy Chase
Starpower Communications
Introduced 02/27/1999
(240) 242-
Landline
Kensington
Starpower Communications
Introduced 02/27/1999
(240) 243-
Landline
Gaithersburg
Allegiance Telecom
Introduced 01/14/2000
(240) 244-
Landline
Mount Rainier
Starpower Communications
Introduced 02/27/1999
(240) 245-
Landline
Glenn Dale
Starpower Communications
Introduced 02/27/1999
(240) 246-
Landline
Gaithersburg
Starpower Communications
Introduced 11/20/1998
(240) 247-
Landline
Mount Rainier
Allegiance Telecom
Introduced 02/27/1999
(240) 248-
Landline
Ridge
Peerless Network Of Maryland
Introduced 02/27/1999
(240) 249-
Landline
Mechanicsville
Teleport Communications America - DC
Introduced 02/27/1999
(240) 250-
Landline
Brandywine
Peerless Network Of Maryland
Introduced 02/27/1999
(240) 251-
Landline
Highfield
Core Communications
Introduced 06/13/2000
(240) 252-
Landline
Gaithersburg
Level 3 Communications
Introduced 05/10/1999
(240) 253-
Landline
Mount Rainier
Global Crossing Local Services-md
Introduced 02/27/1999
(240) 254-
Landline
Hughesville
Teleport Communications America - DC
Introduced 02/27/1999
(240) 255-
Landline
Poolesville
Peerless Network Of Maryland
Introduced 07/22/1999
(240) 256-
Landline
Leonardtown
Teleport Communications America - DC
Introduced 02/27/1999
(240) 257-
Landline
Nanjemoy
Teleport Communications America - DC
Introduced 02/27/1999
(240) 258-
Landline
Ridge
Teleport Communications America - DC
Introduced 02/27/1999
(240) 260-
Landline
Mount Rainier
Allegiance Telecom
Introduced 06/13/2000
(240) 262-
Wireless
Callaway
Sprint Spectrum L.p.
Introduced 10/17/2011
(240) 263-
Wireless
Bethesda
Sprint Spectrum L.p.
Introduced 11/10/2011
(240) 264-
Landline
Beltsville
Verizon Maryland
Introduced 02/27/1999
(240) 265-
Wireless
Bethesda
Sprint Spectrum L.p.
Introduced 11/10/2011
(240) 266-
Landline
Mount Rainier
Peerless Network Of Maryland
Introduced 02/27/1999
(240) 268-
Landline
Rockville
Allegiance Telecom
Introduced 02/27/1999
(240) 269-
Landline
Mount Rainier
Peerless Network Of Maryland
Introduced 02/27/1999
(240) 270-
Wireless
Waldorf
Cellco Partnership DBA Verizon Wireless
Introduced 11/07/2011
(240) 271-
Wireless
Bethesda
New Cingular Wireless PCS - DC
Introduced 02/27/1999
(240) 272-
Wireless
Bethesda
Sprint Spectrum L.p.
Introduced 11/10/2011
(240) 273-
Landline
Mount Rainier
Broadwing Communications. LLC
Introduced 07/22/1999
(240) 274-
Wireless
Bethesda
New Cingular Wireless PCS - DC
Introduced 02/27/1999
(240) 275-
Landline
Grantsville
Core Communications
Introduced 10/31/2000
(240) 276-
Landline
Rockville
Verizon Maryland
Introduced 05/04/2004
(240) 277-
Wireless
Bethesda
Sprint Spectrum L.p.
Introduced 10/18/2002
(240) 278-
Wireless
Laurel
Cellco Partnership DBA Verizon Wireless
Introduced 07/08/2011
(240) 279-
Landline
Waldorf
Core Communications
Introduced 10/31/2000
(240) 280-
Landline
Laurel
Comcast Phone Of Northern Maryland
Introduced 03/03/2001
(240) 281-
Wireless
Bethesda
New Cingular Wireless PCS - DC
Introduced 10/13/1999
(240) 282-
Landline
Mechanicsville
Peerless Network Of Maryland
Introduced 02/27/1999
(240) 283-
Landline
Kensington
Paetec Communications
Introduced 10/13/1999
(240) 284-
Landline
Frostburg
Level 3 Communications
Introduced 11/01/2004
(240) 285-
Landline
Frederick
Cellco Partnership DBA Verizon Wireless
Introduced 06/13/2000
(240) 286-
Wireless
Bethesda
Sprint Spectrum L.p.
Introduced 09/17/2002
(240) 287-
Landline
Hancock
Core Communications
Introduced 06/13/2000
(240) 288-
Landline
Thurmont
Comcast Phone Of Northern Maryland
Introduced 11/01/2004
(240) 289-
Landline
Oxon Hill
Cavalier Telephone Mid-atlantic
Introduced 08/20/2000
(240) 290-
Landline
Mount Rainier
Allegiance Telecom
Introduced 02/27/1999
(240) 291-
Wireless
Hagerstown
New Cingular Wireless PCS - DC
Introduced 10/15/2002
(240) 292-
Landline
Kensington
Verizon Maryland
Introduced 10/13/1999
(240) 293-
Landline
Mount Rainier
Starpower Communications
Introduced 02/27/1999
(240) 294-
Landline
Laurel
Xo Maryland
Introduced 06/30/2001
(240) 295-
Landline
Laurel
Cavalier Telephone Mid-atlantic
Introduced 08/20/2000
(240) 296-
Landline
Hyattsville
Cavalier Telephone Mid-atlantic
Introduced 08/20/2000
(240) 297-
Landline
College Park
Level 3 Communications
Introduced 10/13/1999
(240) 298-
Wireless
Leonardtown
Cellco Partnership DBA Verizon Wireless
Introduced 10/13/1999
(240) 299-
Wireless
Waldorf
Sprint Spectrum L.p.
Introduced 10/13/1999
(240) 300-
Wireless
Waldorf
Cellco Partnership DBA Verizon Wireless
Introduced 12/07/2010
(240) 303-
Landline
Clinton
Cavalier Telephone Mid-atlantic
Introduced 08/20/2000
(240) 304-
Wireless
Mount Rainier
Sprint Spectrum L.p.
Introduced 07/03/2002
(240) 305-
Wireless
Beltsville
Sprint Spectrum L.p.
Introduced 02/27/1999
(240) 306-
Landline
Gaithersburg
Allegiance Telecom
Introduced 06/13/2000
(240) 307-
Landline
Emmitsburg
AT&T Local
Introduced 03/27/2003
(240) 308-
Wireless
Damascus
New Cingular Wireless PCS - DC
Introduced 08/20/2000
(240) 309-
Wireless
Leonardtown
Cellco Partnership DBA Verizon Wireless
Introduced 09/10/2012
(240) 310-
Wireless
Hagerstown
Uscoc Of Cumberland DBA United States Cel Md
Introduced 02/27/1999
(240) 312-
Landline
Capitol Heights
Cavalier Telephone Mid-atlantic
Introduced 08/20/2000
(240) 313-
Landline
Hagerstown
Verizon Maryland
Introduced 10/31/2000
(240) 314-
Landline
Rockville
Verizon Maryland
Introduced 06/13/2000
(240) 315-
Landline
Frederick
Verizon Maryland
Introduced 08/20/2000
(240) 316-
Wireless
Chevy Chase
Sprint Spectrum L.p.
Introduced
(240) 317-
Landline
Callaway
Starpower Communications
Introduced 11/20/1998
(240) 318-
Landline
Clinton
Verizon Maryland
Introduced 01/14/2000
(240) 319-
Wireless
Columbia
Cellco Partnership DBA Verizon Wireless
Introduced 06/06/2008
(240) 320-
Landline
Waldorf
Cavalier East LLC
Introduced 10/31/2000
(240) 321-
Wireless
Oakland
Uscoc Of Cumberland DBA United States Cel Md
Introduced 02/27/1999
(240) 322-
Landline
Mccoole
Core Communications
Introduced 10/31/2000
(240) 323-
Landline
Emmitsburg
Core Communications
Introduced 10/31/2000
(240) 324-
Landline
Clarksville
Ymax Communications Corp.
Introduced 10/08/2008
(240) 325-
Landline
Damascus
Core Communications
Introduced 10/31/2000
(240) 326-
Landline
Upper Marlboro
Cavalier Telephone Mid-atlantic
Introduced 08/20/2000
(240) 327-
Landline
Gaithersburg
Core Communications
Introduced 10/31/2000
(240) 328-
Landline
Rockville
Verizon Maryland
Introduced 08/20/2000
(240) 329-
Landline
Hagerstown
Level 3 Communications
Introduced 10/31/2000
(240) 330-
Wireless
Cabin John
Sprint Spectrum L.p.
Introduced 12/14/2007
(240) 331-
Landline
Mount Rainier
Peerless Network Of Maryland
Introduced 02/27/1999
(240) 332-
Landline
Newburg
Peerless Network Of Maryland
Introduced 02/27/1999
(240) 333-
Landline
Mount Rainier
Cavalier East LLC
Introduced 05/09/2001
(240) 334-
Landline
Mount Rainier
Global Crossing Local Services-md
Introduced 02/27/1999
(240) 335-
Landline
Glenn Dale
Cavalier Telephone Mid-atlantic
Introduced 08/20/2000
(240) 336-
Landline
Bethesda
Core Communications
Introduced 10/31/2000
(240) 337-
Landline
Mount Rainier
Peerless Network Of Maryland
Introduced 02/27/1999
(240) 338-
Wireless
Silver Spring
Cellco Partnership DBA Verizon Wireless
Introduced 01/14/2000
(240) 339-
Landline
Upper Marlboro
Cavalier East LLC
Introduced 10/31/2000
(240) 340-
Wireless
Bethesda
Sprint Spectrum L.p.
Introduced 08/18/2011
(240) 341-
Landline
Adamstown
Mci Worldcom Communications
Introduced 02/25/2009
(240) 342-
Landline
Sandy Spring
Starpower Communications
Introduced 11/20/1998
(240) 343-
Wireless
Hancock
Cellco Partnership DBA Verizon Wireless
Introduced 05/10/2011
(240) 344-
Wireless
Frederick
New Cingular Wireless PCS - DC
Introduced 10/15/2002
(240) 345-
Landline
Sandy Spring
Level 3 Communications
Introduced 03/09/2006
(240) 346-
Wireless
Waldorf
Sprint Spectrum L.p.
Introduced 08/20/2000
(240) 347-
Landline
Hagerstown
Bandwidth.com Clec
Introduced 08/04/2008
(240) 348-
Landline
Oxon Hill
Level 3 Communications
Introduced 08/20/2000
(240) 349-
Landline
La Plata
Global Crossing Local Services-md
Introduced 05/10/1999
(240) 350-
Wireless
Beltsville
Sprint Spectrum L.p.
Introduced 05/10/1999
(240) 351-
Wireless
Beltsville
Sprint Spectrum L.p.
Introduced 05/10/1999
(240) 352-
Landline
La Plata
Peerless Network Of Maryland
Introduced 02/27/1999
(240) 353-
Wireless
Beltsville
Sprint Spectrum L.p.
Introduced 05/10/1999
(240) 354-
Wireless
Beltsville
Sprint Spectrum L.p.
Introduced 05/10/1999
(240) 355-
Wireless
Beltsville
Sprint Spectrum L.p.
Introduced 05/10/1999
(240) 356-
Landline
Frederick
Level 3 Communications
Introduced 03/03/2001
(240) 357-
Wireless
Frederick
Cellco Partnership DBA Verizon Wireless
Introduced 06/12/2006
(240) 358-
Landline
Damascus
Peerless Network Of Maryland
Introduced 02/27/1999
(240) 359-
Landline
Indian Head
Peerless Network Of Maryland
Introduced 02/27/1999
(240) 360-
Wireless
Laurel
Omnipoint Communications Cap Operations
Introduced 09/17/2013
(240) 361-
Landline
Gaithersburg
Cavalier Telephone Mid-atlantic
Introduced 08/20/2000
(240) 362-
Landline
Cumberland
Verizon Maryland
Introduced 02/27/1999
(240) 363-
Landline
Kensington
Global Naps South
Introduced 02/27/1999
(240) 364-
Landline
Gaithersburg
Cavalier East LLC
Introduced 05/09/2001
(240) 365-
Landline
Damascus
Baltimore-washington Telephone (bwt)
Introduced 08/20/2000
(240) 366-
Landline
Williamsport
AT&T Local
Introduced 03/03/2001
(240) 367-
Wireless
Frederick
Sprint Spectrum L.p.
Introduced 10/18/2002
(240) 368-
Landline
Waldorf
Peerless Network Of Maryland
Introduced 02/27/1999
(240) 369-
Landline
Mount Airy
Core Communications
Introduced 10/31/2000
(240) 370-
Wireless
Bethesda
Sprint Spectrum L.p.
Introduced 12/14/2007
(240) 371-
Landline
Mount Rainier
Peerless Network Of Maryland
Introduced 02/27/1999
(240) 372-
Wireless
Gaithersburg
Sprint Spectrum L.p.
Introduced 10/13/1999
(240) 373-
Landline
Odenton
Verizon Maryland
Introduced 11/20/1998
(240) 374-
Landline
Laurel
Global Crossing Local Services-md
Introduced 02/27/1999
(240) 375-
Wireless
Capitol Heights
Sprint Spectrum L.p.
Introduced 11/20/1998
(240) 376-
Landline
Hughesville
Peerless Network Of Maryland
Introduced 02/27/1999
(240) 377-
Landline
Indian Head
Global Crossing Local Services-md
Introduced 05/10/1999
(240) 378-
Landline
Cumberland
Core Communications
Introduced 10/31/2000
(240) 379-
Landline
Frederick
Verizon Maryland
Introduced 03/03/2001
(240) 380-
Wireless
Cabin John
Cellco Partnership DBA Verizon Wireless
Introduced 09/17/2007
(240) 381-
Wireless
Silver Spring
New Cingular Wireless PCS - DC
Introduced 01/14/2000
(240) 382-
Landline
Hagerstown
Teleport Communications America
Introduced 06/11/2009
(240) 383-
Wireless
Chevy Chase
New Cingular Wireless PCS - DC
Introduced 08/20/2000
(240) 384-
Landline
Callaway
Peerless Network Of Maryland
Introduced 02/27/1999
(240) 385-
Landline
Myersville
Verizon Maryland
Introduced 10/31/2000
(240) 386-
Landline
Gaithersburg
Verizon Maryland
Introduced 08/20/2000
(240) 387-
Landline
Chevy Chase
Cavalier East LLC
Introduced 01/14/2000
(240) 388-
Wireless
Gaithersburg
Sprint Spectrum L.p.
Introduced 11/04/2002
(240) 389-
Landline
Sandy Spring
Atx Telecommunications Services, Ltd
Introduced 06/30/2001
(240) 390-
Landline
Sandy Spring
Cavalier Telephone Mid-atlantic
Introduced 08/20/2000
(240) 391-
Landline
Mount Rainier
Global Crossing Local Services-md
Introduced 02/27/1999
(240) 392-
Landline
Oxon Hill
Starpower Communications
Introduced 02/27/1999
(240) 393-
Wireless
Cabin John
Cellco Partnership DBA Verizon Wireless
Introduced 06/13/2000
(240) 394-
Wireless
Mount Airy
New Cingular Wireless PCS - DC
Introduced 12/13/2004
(240) 395-
Landline
Bethesda
Cavalier Telephone Mid-atlantic
Introduced 08/20/2000
(240) 396-
Landline
Mount Rainier
Global Crossing Local Services-md
Introduced 02/27/1999
(240) 397-
Wireless
Frederick
Cellco Partnership DBA Verizon Wireless
Introduced 03/06/2009
(240) 398-
Wireless
Cabin John
Sprint Spectrum L.p.
Introduced 07/03/2002
(240) 399-
Landline
Chevy Chase
Xo Maryland
Introduced 10/13/1999
(240) 400-
Wireless
Bethesda
Sprint Spectrum L.p.
Introduced 08/18/2011
(240) 401-
Wireless
Rockville
New Cingular Wireless PCS - DC
Introduced 11/20/1998
(240) 402-
Landline
College Park
Mci Worldcom Communications
Introduced 09/21/2010
(240) 403-
Landline
Rockville
Cavalier Telephone Mid-atlantic
Introduced 08/20/2000
(240) 404-
Landline
Gaithersburg
Xo Maryland
Introduced 02/13/2001
(240) 405-
Landline
Frederick
Us Lec Of Maryland
Introduced 07/27/2004
(240) 406-
Wireless
Rockville
Leap Wireless Intl DBA Cricket Comm
Introduced 09/17/2009
(240) 407-
Landline
Mount Rainier
Global Crossing Local Services-md
Introduced 02/27/1999
(240) 408-
Wireless
Rockville
Leap Wireless Intl DBA Cricket Comm
Introduced 10/14/2009
(240) 409-
Wireless
Frederick
New Cingular Wireless PCS - DC
Introduced 02/27/1999
(240) 412-
Wireless
Waldorf
Sprint Spectrum L.p.
Introduced 01/16/2001
(240) 413-
Wireless
Hyattsville
Omnipoint Communications Cap Operations
Introduced 03/12/2001
(240) 414-
Landline
Mount Rainier
Peerless Network Of Maryland
Introduced 02/27/1999
(240) 415-
Landline
Frederick
Ymax Communications Corp.
Introduced 12/16/2008
(240) 416-
Wireless
Waldorf
New Cingular Wireless PCS - DC
Introduced 05/18/2001
(240) 417-
Wireless
Capitol Heights
Sprint Spectrum L.p.
Introduced 03/03/2001
(240) 418-
Wireless
Beltsville
Sprint Spectrum L.p.
Introduced 11/12/2001
(240) 419-
Wireless
Waldorf
Cellco Partnership DBA Verizon Wireless
Introduced 10/29/2007
(240) 420-
Landline
Hagerstown
Verizon Maryland
Introduced 07/22/1999
(240) 421-
Wireless
Rockville
Omnipoint Communications Cap Operations
Introduced 04/09/2001
(240) 422-
Wireless
Frederick
Omnipoint Communications Cap Operations
Introduced 05/15/2002
(240) 423-
Wireless
Silver Spring
Omnipoint Communications Cap Operations
Introduced 05/21/2001
(240) 424-
Wireless
Mount Rainier
Sprint Spectrum L.p.
Introduced 11/16/2007
(240) 425-
Landline
Cabin John
Dslnet Communications Va
Introduced 01/25/2001
(240) 426-
Wireless
Bethesda
Sprint Spectrum L.p.
Introduced 10/25/2001
(240) 427-
Landline
Waldorf
Xo Maryland
Introduced 04/23/2001
(240) 428-
Landline
Rockville
Bandwidth.com Clec
Introduced 10/14/2009
(240) 429-
Wireless
Silver Spring
Cellco Partnership DBA Verizon Wireless
Introduced 12/19/2006
(240) 430-
Landline
Kensington
Cavalier Telephone Mid-atlantic
Introduced 08/20/2000
(240) 431-
Wireless
Tall Timbers
Sprint Spectrum L.p.
Introduced 10/31/2000
(240) 432-
Wireless
Beltsville
Sprint Spectrum L.p.
Introduced 02/27/1999
(240) 433-
Landline
Silver Spring
Cavalier Telephone Mid-atlantic
Introduced 08/20/2000
(240) 434-
Landline
Leonardtown
Broadwing Communications. LLC
Introduced 10/31/2000
(240) 435-
Wireless
Waldorf
Cellco Partnership DBA Verizon Wireless
Introduced 05/07/2009
(240) 436-
Landline
Ijamsville
Telcove Operations
Introduced 08/20/2000
(240) 437-
Landline
Sandy Spring
Xo Maryland
Introduced 06/30/2001
(240) 438-
Wireless
Silver Spring
Sprint Spectrum L.p.
Introduced 08/15/2011
(240) 439-
Wireless
Frederick
Cellco Partnership DBA Verizon Wireless
Introduced 06/06/2008
(240) 440-
Wireless
Frederick
Leap Wireless Intl DBA Cricket Comm
Introduced 02/27/2009
(240) 441-
Wireless
Oxon Hill
Omnipoint Communications Cap Operations
Introduced 06/06/2001
(240) 442-
Landline
Oakland
Verizon Maryland
Introduced 05/22/2001
(240) 444-
Wireless
Laurel
Cellco Partnership DBA Verizon Wireless
Introduced 09/07/2011
(240) 445-
Wireless
Bethesda
Sprint Spectrum L.p.
Introduced 11/10/2011
(240) 446-
Wireless
Frederick
Cellco Partnership DBA Verizon Wireless
Introduced 08/09/2001
(240) 447-
Wireless
Rockville
New Cingular Wireless PCS - DC
Introduced 02/27/1999
(240) 448-
Wireless
Waldorf
Sprint Spectrum L.p.
Introduced 09/07/2011
(240) 449-
Wireless
Gaithersburg
New Cingular Wireless PCS - DC
Introduced 03/03/2001
(240) 450-
Landline
Silver Spring
Cavalier Telephone Mid-atlantic
Introduced 08/20/2000
(240) 452-
Landline
Hagerstown
Lumos Networks Inc. - VA
Introduced 07/22/2010
(240) 453-
Landline
Rockville
Verizon Maryland
Introduced 11/20/1998
(240) 454-
Wireless
Gaithersburg
Paetec Communications
Introduced 04/22/2005
(240) 455-
Landline
Oxon Hill
Paetec Communications
Introduced 06/20/2001
(240) 456-
Landline
Laurel
Verizon Maryland
Introduced 08/20/2000
(240) 457-
Wireless
Frederick
Cellco Partnership DBA Verizon Wireless
Introduced 09/04/2008
(240) 458-
Wireless
Waldorf
Cellco Partnership DBA Verizon Wireless
Introduced 10/04/2011
(240) 459-
Wireless
Laurel
Cellco Partnership DBA Verizon Wireless
Introduced 07/27/2010
(240) 460-
Wireless
Silver Spring
New Cingular Wireless PCS - DC
Introduced 07/22/1999
(240) 461-
Wireless
Silver Spring
New Cingular Wireless PCS - DC
Introduced 07/22/1999
(240) 462-
Wireless
Beltsville
Sprint Spectrum L.p.
Introduced 02/27/1999
(240) 463-
Wireless
Silver Spring
New Cingular Wireless PCS - DC
Introduced 02/27/1999
(240) 464-
Landline
Chevy Chase
Sprint Spectrum L.p.
Introduced 05/10/1999
(240) 465-
Landline
Mount Rainier
Peerless Network Of Maryland
Introduced 02/27/1999
(240) 466-
Wireless
Mechanicsville
New Cingular Wireless PCS - DC
Introduced 10/31/2001
(240) 467-
Landline
Oxon Hill
Comcast Phone Of Northern Maryland
Introduced 04/25/2013
(240) 468-
Wireless
Mount Rainier
Sprint Spectrum L.p.
Introduced 11/16/2007
(240) 469-
Wireless
Hagerstown
Sprint Spectrum L.p.
Introduced 02/14/2008
(240) 470-
Wireless
Laurel
Cellco Partnership DBA Verizon Wireless
Introduced 10/04/2011
(240) 471-
Landline
Silver Spring
Global Crossing Local Services-md
Introduced 02/27/1999
(240) 472-
Wireless
Silver Spring
New Cingular Wireless PCS - DC
Introduced 08/20/2000
(240) 473-
Landline
College Park
Cavalier Telephone Mid-atlantic
Introduced 08/20/2000
(240) 475-
Wireless
Silver Spring
New Cingular Wireless PCS - DC
Introduced 08/20/2000
(240) 476-
Wireless
Silver Spring
Omnipoint Communications Cap Operations
Introduced 02/21/2001
(240) 477-
Landline
Gaithersburg
Lightwave Communications
Introduced 05/20/2005
(240) 478-
Wireless
Cabin John
New Cingular Wireless PCS - DC
Introduced 07/27/2004
(240) 479-
Wireless
Oxon Hill
Cellco Partnership DBA Verizon Wireless
Introduced 04/07/2008
(240) 480-
Wireless
Bethesda
Sprint Spectrum L.p.
Introduced 09/27/2010
(240) 481-
Wireless
Silver Spring
Omnipoint Communications Cap Operations
Introduced 05/11/2001
(240) 482-
Landline
Cabin John
Us Lec Of Maryland
Introduced 01/14/2000
(240) 483-
Landline
Oxon Hill
Comcast Phone Of Northern Maryland
Introduced 10/31/2001
(240) 485-
Landline
Cabin John
Us Lec Of Maryland
Introduced 01/14/2000
(240) 486-
Wireless
Glenn Dale
Omnipoint Communications Cap Operations
Introduced 03/12/2001
(240) 487-
Landline
Hyattsville
Us Lec Of Maryland
Introduced 01/14/2000
(240) 488-
Landline
Oakland
Shentel Communications
Introduced 05/16/2012
(240) 489-
Landline
Poolesville
Xo Maryland
Introduced 02/13/2001
(240) 490-
Wireless
Middletown
Omnipoint Communications Cap Operations
Introduced 06/12/2001
(240) 491-
Landline
Mount Rainier
Global Crossing Local Services-md
Introduced 02/27/1999
(240) 492-
Landline
Capitol Heights
Us Lec Of Maryland
Introduced 01/14/2000
(240) 493-
Landline
Oxon Hill
Us Lec Of Maryland
Introduced 01/14/2000
(240) 494-
Landline
Mount Rainier
Cavalier East LLC
Introduced 05/09/2001
(240) 495-
Wireless
Mount Rainier
Cellco Partnership DBA Verizon Wireless
Introduced 10/29/2013
(240) 497-
Landline
Chevy Chase
Verizon Maryland
Introduced 10/31/2000
(240) 498-
Wireless
Beltsville
Sprint Spectrum L.p.
Introduced 10/31/2000
(240) 499-
Landline
Cabin John
Us Lec Of Maryland
Introduced 01/14/2000
(240) 500-
Landline
Hagerstown
Us Lec Of Maryland
Introduced 10/21/2010
(240) 501-
Wireless
Silver Spring
Sprint Spectrum L.p.
Introduced 10/08/2001
(240) 502-
Wireless
Silver Spring
Sprint Spectrum L.p.
Introduced 10/04/2011
(240) 503-
Landline
Newburg
Peerless Network Of Maryland
Introduced 04/09/2013
(240) 504-
Wireless
Silver Spring
Sprint Spectrum L.p.
Introduced 10/04/2011
(240) 505-
Wireless
Silver Spring
Omnipoint Communications Cap Operations
Introduced 10/31/2001
(240) 506-
Wireless
Rockville
New Cingular Wireless PCS - DC
Introduced 01/09/2002
(240) 507-
Wireless
Cabin John
Cellco Partnership DBA Verizon Wireless
Introduced 09/05/2008
(240) 508-
Wireless
Capitol Heights
Sprint Spectrum L.p.
Introduced 02/27/1999
(240) 509-
Landline
Crofton
Bandwidth.com Clec
Introduced 03/31/2008
(240) 510-
Landline
Upper Marlboro
Xo Maryland
Introduced 10/31/2001
(240) 512-
Landline
College Park
Core Communications
Introduced 08/08/2006
(240) 513-
Wireless
Hagerstown
Sprint Spectrum L.p.
Introduced 10/19/2011
(240) 514-
Landline
Cabin John
Us Lec Of Maryland
Introduced 01/14/2000
(240) 515-
Wireless
Bethesda
New Cingular Wireless PCS - DC
Introduced 06/20/2001
(240) 516-
Landline
Silver Spring
Us Lec Of Maryland
Introduced 01/14/2000
(240) 518-
Wireless
Waldorf
Sprint Spectrum L.p.
Introduced 10/21/2011
(240) 519-
Wireless
Bethesda
Sprint Spectrum L.p.
Introduced 11/10/2011
(240) 520-
Wireless
Hagerstown
Sprint Spectrum L.p.
Introduced 03/29/2006
(240) 522-
Wireless
Cumberland
Sprint Spectrum L.p.
Introduced 12/12/2001
(240) 523-
Landline
La Plata
Xo Maryland
Introduced 02/13/2001
(240) 524-
Landline
Laurel
Peerless Network Of Maryland
Introduced 02/27/1999
(240) 525-
Landline
Upper Marlboro
Peerless Network Of Maryland
Introduced 02/27/1999
(240) 526-
Landline
Leonardtown
Peerless Network Of Maryland
Introduced 02/27/1999
(240) 527-
Landline
Hagerstown
Verizon Maryland
Introduced 10/31/2000
(240) 528-
Landline
Hughesville
Broadwing Communications. LLC
Introduced 10/31/2000
(240) 529-
Landline
Frederick
Verizon Maryland
Introduced 10/31/2000
(240) 530-
Landline
Waldorf
Local Access LLC
Introduced 08/01/2013
(240) 532-
Wireless
Oxon Hill
Cellco Partnership DBA Verizon Wireless
Introduced 10/29/2013
(240) 533-
Landline
Mount Rainier
Teleport Communications America - DC
Introduced 07/22/1999
(240) 535-
Wireless
Silver Spring
New Cingular Wireless PCS - DC
Introduced 01/09/2001
(240) 536-
Landline
Sandy Spring
Peerless Network Of Maryland
Introduced 02/27/1999
(240) 538-
Landline
Leonardtown
Xo Maryland
Introduced 02/13/2001
(240) 539-
Landline
Mount Rainier
Peerless Network Of Maryland
Introduced 02/27/1999
(240) 541-
Wireless
Bethesda
Sprint Spectrum L.p.
Introduced 10/31/2011
(240) 542-
Landline
College Park
Us Lec Of Maryland
Introduced 01/14/2000
(240) 543-
Wireless
Bethesda
Sprint Spectrum L.p.
Introduced 07/25/2006
(240) 544-
Landline
Glenn Dale
Us Lec Of Maryland
Introduced 01/14/2000
(240) 545-
Landline
Upper Marlboro
Us Lec Of Maryland
Introduced 01/14/2000
(240) 546-
Landline
Clinton
Us Lec Of Maryland
Introduced 01/14/2000
(240) 547-
Landline
Laurel
Level 3 Communications
Introduced 07/22/1999
(240) 548-
Landline
Mount Rainier
Allegiance Telecom
Introduced 10/31/2000
(240) 550-
Wireless
Rockville
Leap Wireless Intl DBA Cricket Comm
Introduced 03/26/2009
(240) 551-
Wireless
Rockville
Leap Wireless Intl DBA Cricket Comm
Introduced 03/25/2009
(240) 552-
Wireless
Rockville
Leap Wireless Intl DBA Cricket Comm
Introduced 03/25/2009
(240) 553-
Landline
Mount Rainier
Allegiance Telecom
Introduced 08/20/2000
(240) 554-
Landline
Laurel
Allegiance Telecom
Introduced 10/31/2000
(240) 556-
Landline
Glenn Dale
Paetec Communications
Introduced 10/31/2001
(240) 558-
Landline
Kensington
Cavalier Telephone Mid-atlantic
Introduced 06/30/2001
(240) 559-
Landline
Sandy Spring
Allegiance Telecom
Introduced 10/31/2000
(240) 560-
Landline
Chevy Chase
Xo Maryland
Introduced 04/23/2001
(240) 561-
Wireless
Leonardtown
Cellco Partnership DBA Verizon Wireless
Introduced 07/07/2008
(240) 565-
Wireless
Laurel
Omnipoint Communications Cap Operations
Introduced 12/30/2005
(240) 566-
Landline
Frederick
Verizon Maryland
Introduced 06/11/2002
(240) 567-
Landline
Rockville
Verizon Maryland
Introduced 07/12/2006
(240) 568-
Landline
Laurel
Verizon Maryland
Introduced 07/22/1999
(240) 573-
Landline
Upper Marlboro
Global Crossing Local Services-md
Introduced 07/22/1999
(240) 575-
Landline
Frederick
Level 3 Communications
Introduced 12/30/2005
(240) 577-
Wireless
Leonardtown
Cellco Partnership DBA Verizon Wireless
Introduced 08/09/2006
(240) 578-
Wireless
Frederick
Cellco Partnership DBA Verizon Wireless
Introduced 07/08/2011
(240) 580-
Wireless
Cumberland
Sprint Spectrum L.p.
Introduced 06/14/2001
(240) 581-
Landline
Laurel
Paetec Communications - DC
Introduced 03/03/2001
(240) 582-
Landline
Hyattsville
Verizon Maryland
Introduced 07/22/1999
(240) 583-
Landline
Beltsville
Verizon Maryland
Introduced 04/28/2010
(240) 585-
Wireless
Waldorf
Cellco Partnership DBA Verizon Wireless
Introduced 06/29/2011
(240) 586-
Landline
Frederick
Verizon Maryland
Introduced 12/22/2006
(240) 587-
Wireless
Leonardtown
Cellco Partnership DBA Verizon Wireless
Introduced 07/06/2009
(240) 593-
Wireless
Laurel
Omnipoint Communications Cap Operations
Introduced 03/13/2001
(240) 595-
Wireless
Chevy Chase
Cellco Partnership DBA Verizon Wireless
Introduced 09/13/2006
(240) 597-
Landline
Gaithersburg
Peerless Network Of Maryland
Introduced 02/27/1999
(240) 599-
Landline
Rockville
Broadwing Communications. LLC
Introduced 07/22/1999
(240) 600-
Wireless
Mount Rainier
Sprint Spectrum L.p.
Introduced 04/27/2011
(240) 601-
Wireless
Beltsville
Sprint Spectrum L.p.
Introduced 07/22/1999
(240) 602-
Wireless
Beltsville
Sprint Spectrum L.p.
Introduced 07/22/1999
(240) 603-
Wireless
Beltsville
Sprint Spectrum L.p.
Introduced 07/22/1999
(240) 604-
Wireless
Beltsville
Sprint Spectrum L.p.
Introduced 07/22/1999
(240) 605-
Wireless
Beltsville
Sprint Spectrum L.p.
Introduced 07/22/1999
(240) 606-
Wireless
Beltsville
Sprint Spectrum L.p.
Introduced 07/22/1999
(240) 607-
Landline
Waldorf
Global Crossing Local Services-md
Introduced 05/10/1999
(240) 608-
Wireless
Frederick
365 Wireless
Introduced 03/11/2013
(240) 612-
Landline
Mount Rainier
Tw Telecom Of Maryland LLC
Introduced 08/04/2010
(240) 613-
Landline
Hyattsville
Us Lec Of Maryland
Introduced 04/05/2012
(240) 614-
Wireless
Rockville
Metro PCS
Introduced 07/16/2013
(240) 615-
Wireless
Hyattsville
Metro PCS
Introduced 05/29/2013
(240) 616-
Landline
College Park
Mci Worldcom Communications
Introduced 06/30/2001
(240) 617-
Unknown
Shentel Communications
Introduced 05/12/2014
(240) 619-
Landline
Chevy Chase
Mci Worldcom Communications
Introduced 08/20/2000
(240) 620-
Landline
Rockville
Mci Worldcom Communications
Introduced 08/20/2000
(240) 621-
Landline
Kensington
Mci Worldcom Communications
Introduced 08/20/2000
(240) 624-
Landline
Greenbelt
Verizon Maryland
Introduced 06/13/2000
(240) 625-
Wireless
Hagerstown
Sprint Spectrum L.p.
Introduced 04/17/2001
(240) 626-
Wireless
Frederick
Sprint Spectrum L.p.
Introduced 05/10/1999
(240) 627-
Landline
Mount Rainier
Global Crossing Local Services-md
Introduced 02/27/1999
(240) 629-
Landline
Frederick
Verizon Maryland
Introduced 10/13/1999
(240) 630-
Landline
Mount Rainier
Bandwidth.com Clec
Introduced 10/31/2011
(240) 631-
Landline
Gaithersburg
Verizon Maryland
Introduced 11/20/1998
(240) 632-
Landline
Gaithersburg
Verizon Maryland
Introduced 07/22/1999
(240) 638-
Landline
Mount Rainier
Broadwing Communications. LLC
Introduced 05/10/1999
(240) 640-
Wireless
Waldorf
Leap Wireless Intl DBA Cricket Comm
Introduced 03/24/2009
(240) 643-
Wireless
Silver Spring
Omnipoint Communications Cap Operations
Introduced 05/16/2002
(240) 644-
Landline
Chevy Chase
Xo Maryland
Introduced 10/31/2000
(240) 645-
Landline
Chevy Chase
Xo Maryland
Introduced 10/31/2000
(240) 646-
Landline
Laurel
Cavalier East LLC
Introduced 10/13/1999
(240) 650-
Landline
Cabin John
Broadvox-clec - DC
Introduced 11/17/2011
(240) 651-
Wireless
Frederick
Halo Wireless Services
Introduced 11/28/2011
(240) 652-
Landline
Mechanicsville
Xo Maryland
Introduced 02/13/2001
(240) 654-
Wireless
Gaithersburg
New Cingular Wireless PCS - DC
Introduced 05/19/2006
(240) 662-
Landline
Silver Spring
Verizon Maryland
Introduced 01/14/2000
(240) 667-
Landline
Mount Rainier
Global Crossing Local Services-md
Introduced 02/27/1999
(240) 668-
Landline
Damascus
Starpower Communications
Introduced 11/20/1998
(240) 669-
Landline
Kensington
Comcast Phone Of Northern Maryland
Introduced 10/31/2000
(240) 670-
Landline
Mount Rainier
Local Access LLC
Introduced 03/06/2012
(240) 671-
Wireless
Mount Rainier
Sprint Spectrum L.p.
Introduced 10/31/2000
(240) 672-
Landline
Rockville
Cellco Partnership DBA Verizon Wireless
Introduced 10/31/2000
(240) 674-
Wireless
Frederick
Sprint Spectrum L.p.
Introduced 10/13/1999
(240) 675-
Wireless
Myersville
New Cingular Wireless PCS - DC
Introduced 05/10/1999
(240) 676-
Wireless
Silver Spring
Cellco Partnership DBA Verizon Wireless
Introduced 02/27/1999
(240) 678-
Wireless
Silver Spring
Cellco Partnership DBA Verizon Wireless
Introduced 02/27/1999
(240) 682-
Landline
Waldorf
Starpower Communications
Introduced 11/20/1998
(240) 683-
Landline
Gaithersburg
Verizon Maryland
Introduced 03/03/2001
(240) 684-
Landline
Greenbelt
Verizon Maryland
Introduced 10/31/2000
(240) 685-
Landline
Brandywine
Global Crossing Local Services-md
Introduced 05/10/1999
(240) 686-
Landline
Gaithersburg
Verizon Maryland
Introduced 03/03/2001
(240) 687-
Wireless
Silver Spring
Cellco Partnership DBA Verizon Wireless
Introduced 02/27/1999
(240) 688-
Wireless
Silver Spring
Cellco Partnership DBA Verizon Wireless
Introduced 06/12/2006
(240) 691-
Landline
Mount Rainier
Global Crossing Local Services-md
Introduced 02/27/1999
(240) 694-
Landline
Rockville
Verizon Maryland
Introduced 11/20/1998
(240) 695-
Landline
Temple Hills
Verizon Maryland
Introduced 11/20/1998
(240) 696-
Landline
Hyattsville
Level 3 Communications
Introduced 07/22/1999
(240) 699-
Landline
Adamstown
Verizon Maryland
Introduced 05/22/2001
(240) 701-
Wireless
Silver Spring
Leap Wireless Intl DBA Cricket Comm
Introduced 03/25/2009
(240) 704-
Wireless
Mount Rainier
Leap Wireless Intl DBA Cricket Comm
Introduced 03/25/2009
(240) 705-
Wireless
Chevy Chase
Leap Wireless Intl DBA Cricket Comm
Introduced 03/25/2009
(240) 706-
Wireless
Chevy Chase
Leap Wireless Intl DBA Cricket Comm
Introduced 03/26/2009
(240) 707-
Wireless
Hagerstown
New Cingular Wireless PCS - DC
Introduced 01/27/2012
(240) 708-
Wireless
Columbia
Level 3 Communications
Introduced 06/08/2012
(240) 712-
Wireless
Columbia
Cellco Partnership DBA Verizon Wireless
Introduced 11/01/2011
(240) 713-
Landline
Laurel
Peerless Network Of Maryland
Introduced 11/02/2011
(240) 715-
Landline
Rockville
Global Crossing Local Services-md
Introduced 02/27/1999
(240) 716-
Wireless
Mount Rainier
Omnipoint Communications Cap Operations
Introduced 11/15/2013
(240) 718-
Landline
Callaway
Xo Maryland
Introduced 02/13/2001
(240) 720-
Landline
Gaithersburg
Global Crossing Local Services-md
Introduced 02/27/1999
(240) 722-
Landline
Sandy Spring
Global Crossing Local Services-md
Introduced 02/27/1999
(240) 723-
Landline
Silver Spring
Cellco Partnership DBA Verizon Wireless
Introduced 05/10/1999
(240) 724-
Landline
Mount Rainier
Cavalier East LLC
Introduced 10/31/2000
(240) 725-
Landline
Lexington Park
Verizon Maryland
Introduced 11/20/1998
(240) 727-
Wireless
Cumberland
New Cingular Wireless PCS - DC
Introduced 07/22/1999
(240) 731-
Wireless
Rockville
New Cingular Wireless PCS - DC
Introduced 10/31/2000
(240) 734-
Landline
Hagerstown
Bandwidth.com Clec
Introduced 03/22/2012
(240) 737-
Landline
Mount Rainier
Cavalier East LLC
Introduced 05/09/2001
(240) 743-
Landline
Oxon Hill
Local Access LLC
Introduced 11/16/2006
(240) 744-
Landline
Mount Rainier
Broadwing Communications. LLC
Introduced 05/10/1999
(240) 745-
Landline
Damascus
Xo Maryland
Introduced 10/31/2001
(240) 747-
Landline
Mount Rainier
Cavalier East LLC
Introduced 05/09/2001
(240) 750-
Wireless
Gaithersburg
New Cingular Wireless PCS - DC
Introduced 05/06/2005
(240) 751-
Landline
Gaithersburg
Telcove Operations
Introduced 08/20/2000
(240) 752-
Landline
Bethesda
Telcove Operations
Introduced 08/20/2000
(240) 753-
Landline
Rockville
Telcove Operations
Introduced 08/20/2000
(240) 754-
Landline
Waldorf
Level 3 Communications
Introduced 11/11/2011
(240) 755-
Landline
Laurel
Comcast Phone Of Northern Maryland
Introduced 01/05/2006
(240) 757-
Landline
Mount Rainier
Peerless Network Of Maryland
Introduced 07/22/1999
(240) 762-
Wireless
Mount Rainier
Cellco Partnership DBA Verizon Wireless
Introduced 08/22/2012
(240) 764-
Landline
Chevy Chase
Xo Maryland
Introduced 10/31/2000
(240) 765-
Landline
Chevy Chase
Xo Maryland
Introduced 10/31/2000
(240) 766-
Landline
Chevy Chase
Xo Maryland
Introduced 10/31/2000
(240) 767-
Landline
Capitol Heights
Cavalier East LLC
Introduced 05/09/2001
(240) 770-
Landline
Oxon Hill
Comcast Phone Of Northern Maryland
Introduced 11/22/2004
(240) 772-
Wireless
Frederick
Cellco Partnership DBA Verizon Wireless
Introduced 11/17/2011
(240) 773-
Landline
Rockville
Verizon Maryland
Introduced 10/13/1999
(240) 776-
Landline
La Plata
Broadwing Communications. LLC
Introduced 05/10/1999
(240) 777-
Landline
Rockville
Verizon Maryland
Introduced 05/10/1999
(240) 778-
Landline
Chevy Chase
Xo Maryland
Introduced 10/31/2000
(240) 779-
Landline
Sandy Spring
Cavalier East LLC
Introduced 10/31/2000
(240) 780-
Landline
Gaithersburg
Broadwing Communications. LLC
Introduced 05/10/1999
(240) 782-
Landline
Damascus
Global Crossing Local Services-md
Introduced 05/10/1999
(240) 783-
Wireless
Bethesda
Mte DBA Mte Paging Network
Introduced 05/10/1999
(240) 784-
Wireless
Myersville
Omnipoint Communications Cap Operations
Introduced 06/06/2001
(240) 786-
Landline
Laurel
Broadwing Communications. LLC
Introduced 05/10/1999
(240) 787-
Landline
Brandywine
Broadwing Communications. LLC
Introduced 05/10/1999
(240) 788-
Landline
Oxon Hill
Broadwing Communications. LLC
Introduced 05/10/1999
(240) 790-
Landline
Mount Rainier
Broadwing Communications. LLC
Introduced 05/10/1999
(240) 793-
Wireless
Gaithersburg
Sprint Spectrum L.p.
Introduced 03/15/2001
(240) 794-
Landline
Callaway
Broadwing Communications. LLC
Introduced 05/10/1999
(240) 800-
Landline
Chevy Chase
Core Communications
Introduced 06/22/2012
(240) 801-
Wireless
Gaithersburg
Cellco Partnership DBA Verizon Wireless
Introduced 10/04/2013
(240) 802-
Wireless
Bethesda
365 Wireless
Introduced 05/10/2013
(240) 803-
Wireless
Cumberland
New Cingular Wireless PCS - DC
Introduced 01/27/2012
(240) 804-
Landline
Newburg
Xo Maryland
Introduced 04/23/2001
(240) 812-
Landline
Poolesville
Global Crossing Local Services-md
Introduced 05/10/1999
(240) 813-
Landline
Gaithersburg
Atx Telecommunications Services, Ltd
Introduced 06/30/2001
(240) 818-
Landline
Smithsburg
Verizon Maryland
Introduced 10/13/1999
(240) 821-
Landline
Silver Spring
Lightwave Communications
Introduced 05/27/2005
(240) 823-
Landline
Brandywine
Xo Maryland
Introduced 02/13/2001
(240) 826-
Landline
Rockville
Verizon Maryland
Introduced 05/07/2007
(240) 832-
Wireless
Bethesda
Sprint Spectrum L.p.
Introduced 05/10/1999
(240) 833-
Landline
Chevy Chase
Xo Maryland
Introduced 10/31/2000
(240) 837-
Landline
Hughesville
Xo Maryland
Introduced 02/13/2001
(240) 838-
Wireless
Oxon Hill
Omnipoint Communications Cap Operations
Introduced 03/12/2001
(240) 839-
Wireless
Silver Spring
Cellco Partnership DBA Verizon Wireless
Introduced 01/13/2007
(240) 841-
Landline
Laurel
Allegiance Telecom
Introduced 10/31/2000
(240) 842-
Landline
Glenn Dale
Allegiance Telecom
Introduced 10/31/2000
(240) 843-
Landline
College Park
Allegiance Telecom
Introduced 10/31/2000
(240) 844-
Landline
Ridge
Xo Maryland
Introduced 02/13/2001
(240) 845-
Landline
Chevy Chase
Xo Maryland
Introduced 10/31/2000
(240) 846-
Landline
Clinton
Xo Maryland
Introduced 10/31/2000
(240) 848-
Wireless
Gaithersburg
Sprint Spectrum L.p.
Introduced 03/03/2001
(240) 855-
Wireless
Cabin John
Sprint Spectrum L.p.
Introduced 10/09/2006
(240) 857-
Landline
Mount Rainier
Tw Telecom Of Maryland LLC
Introduced 05/10/1999
(240) 863-
Landline
Laurel
Tw Telecom Of Maryland LLC
Introduced 05/10/1999
(240) 864-
Landline
Rockville
Cavalier East LLC
Introduced 05/09/2001
(240) 865-
Landline
Baltimore
Level 3 Communications
Introduced 03/03/2001
(240) 868-
Landline
Mount Rainier
Cavalier East LLC
Introduced 05/09/2001
(240) 876-
Wireless
Bethesda
Sprint Spectrum L.p.
Introduced 11/20/1998
(240) 880-
Landline
Chevy Chase
Broadwing Communications. LLC
Introduced 07/22/1999
(240) 882-
Wireless
Capitol Heights
Sprint Spectrum L.p.
Introduced 11/20/1998
(240) 883-
Landline
Sandy Spring
Broadwing Communications. LLC
Introduced 07/22/1999
(240) 888-
Wireless
Rockville
New Cingular Wireless PCS - DC
Introduced 03/03/2001
(240) 892-
Landline
Upper Marlboro
Broadwing Communications. LLC
Introduced 07/22/1999
(240) 893-
Wireless
Silver Spring
New Cingular Wireless PCS - DC
Introduced 03/03/2001
(240) 895-
Landline
Lexington Park
Verizon Maryland
Introduced 06/30/2001
(240) 897-
Landline
Mount Rainier
Broadwing Communications. LLC
Introduced 07/22/1999
(240) 898-
Landline
Mount Rainier
Broadwing Communications. LLC
Introduced 07/22/1999
(240) 899-
Wireless
Bethesda
Omnipoint Communications Cap Operations
Introduced 03/13/2001
(240) 901-
Unknown
Centurylink Communications LLC
Introduced 05/22/2014
(240) 903-
Landline
Indian Head
Comcast Phone Of Northern Maryland
Introduced 12/03/2013
(240) 912-
Landline
Gaithersburg
Us Lec Of Maryland
Introduced 01/14/2000
(240) 920-
Landline
Cumberland
Level 3 Communications
Introduced 05/03/2001
(240) 925-
Wireless
Leonardtown
Cellco Partnership DBA Verizon Wireless
Introduced 08/09/2001
(240) 929-
Landline
Mount Rainier
Cavalier East LLC
Introduced 10/13/1999
(240) 938-
Wireless
Ashton
Omnipoint Communications Cap Operations
Introduced 06/06/2001
(240) 949-
Landline
Mount Rainier
Cavalier East LLC
Introduced 05/09/2001
(240) 964-
Landline
Cumberland
Verizon Maryland
Introduced 05/27/2008
(240) 965-
Landline
College Park
Paetec Communications
Introduced 10/31/2000
(240) 976-
Unknown
Baltimore-washington Telephone (bwt)
Introduced 10/17/2005
(240) 979-
Landline
Cumberland
Level 3 Communications
Introduced 03/03/2001
(240) 986-
Landline
Nanjemoy
Xo Maryland
Introduced 02/13/2001
(240) 988-
Wireless
Beltsville
Sprint Spectrum L.p.
Introduced 05/10/1999
(240) 993-
Landline
Indian Head
Xo Maryland
Introduced 02/13/2001
(240) 994-
Wireless
Rockville
Cellco Partnership DBA Verizon Wireless
Introduced 10/13/1999
(240) 997-
Wireless
Silver Spring
Cellco Partnership DBA Verizon Wireless
Introduced 10/13/1999

Heavily Reported Numbers

Phone complaint data powered by CallerCenter.com

Most Searched Numbers

Cell
All Time
240-203-0000
240-203-0001
240-203-0019
240-203-0023
240-203-0262
240-203-0433
240-203-0803
240-203-0939
240-203-1096
240-203-1240
240-203-1297
240-203-1336
240-203-1389
240-203-1428
240-203-1429
240-203-1527
240-203-1608
240-203-1850
240-203-1851
240-203-1862
This Month
240-203-0000
240-203-0001
240-203-0019
240-203-0023
240-203-0262
240-203-0433
240-203-0803
240-203-0939
240-203-1096
240-203-1240
240-203-1297
240-203-1336
240-203-1389
240-203-1428
240-203-1429
240-203-1527
240-203-1608
240-203-1850
240-203-1851
240-203-1862
Landline
All Time
240-200-0000
240-200-0001
240-200-0002
240-200-0141
240-200-0182
240-200-0760
240-200-0778
240-200-0812
240-200-0826
240-200-0832
240-200-0868
240-200-0908
240-200-1028
240-200-1219
240-200-1500
240-200-1502
240-200-1505
240-200-1507
240-200-1509
240-200-1511
This Month
240-200-0000
240-200-0001
240-200-0002
240-200-0141
240-200-0182
240-200-0760
240-200-0778
240-200-0812
240-200-0826
240-200-0832
240-200-0868
240-200-0908
240-200-1028
240-200-1219
240-200-1500
240-200-1502
240-200-1505
240-200-1507
240-200-1509
240-200-1511


Source: Area code information compiled from the North American Numbering Plan Administration (NANPA), telecom providers, and the U.S. Census Bureau.