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331 Area Code

State: Illinois
Major City: Aurora
Timezone: Central
Current Time: 3:25am
Short URL: allareacodes.com/331

Area Code 331 Map

Where is area code 331?

Area code 331 is located in Illinois and covers Aurora, Naperville, Bolingbrook, and Wheaton. It is an overlay for area code 630 and serves the same area.

What time zone is area code 331?

The 331 area code is located in the Central timezone. The Central time zone is also known as America/Chicago. As of the last time this page was loaded, the current time is 3:25am.

History

331 was first put in service October 7, 2007. It was created from area code 630.

Nearby Area Codes

224/847 (Elgin, IL)
309 (Peoria, IL)
331/630 (Aurora, IL)
708 (Cicero, IL)
773 (Chicago, IL)
779/815 (Rockford, IL)
872 (Chicago, IL)

Top 4 Counties in Area Code 331

CountyTotal Population% of 331% of County
DuPage, IL916,92436%100%
Kane, IL515,26933%59%
Kendall, IL114,73620%58%
Will, IL677,5606%6%

Top 50 Cities in Area Code 331

CityTotal Population% of 331% of City
Aurora, IL197,8995%100%
Naperville, IL141,8534%100%
Bolingbrook, IL73,3662%91%
Wheaton, IL52,8941%100%
Downers Grove, IL47,8332%100%
Elmhurst, IL44,1211%100%
Lombard, IL43,1651%100%
Carol Stream, IL39,7111%100%
Bartlett, IL41,2082%94%
Streamwood, IL39,8581%97%
Hanover Park, IL37,9731%100%
Addison, IL36,9421%100%
Glendale Heights, IL34,2081%100%
St. Charles, IL32,9742%100%
Woodridge, IL32,9711%100%
Oswego, IL30,3552%100%
Glen Ellyn, IL27,4501%100%
West Chicago, IL27,0862%100%
Batavia, IL26,0451%100%
Westmont, IL24,6851%100%
Roselle, IL22,7631%100%
Lisle, IL22,3901%100%
Darien, IL22,0861%100%
Bloomingdale, IL22,0181%100%
Villa Park, IL21,9041%100%
Geneva, IL21,4951%100%
Montgomery, IL18,4381%100%
Bensenville, IL18,3521%99%
North Aurora, IL16,7601%100%
Hinsdale, IL16,8160%98%
Yorkville, IL16,9212%96%
Lemont, IL16,0001%100%
Wood Dale, IL13,7701%100%
Warrenville, IL13,1401%100%
Plano, IL10,8561%100%
Burr Ridge, IL10,5591%99%
Campton Hills, IL11,1312%82%
Winfield, IL9,0800%100%
Sugar Grove, IL8,9971%100%
Itasca, IL8,6491%100%
Willowbrook, IL8,5400%100%
Clarendon Hills, IL8,4270%100%
Joliet, IL147,4330%6%
Boulder Hill, IL8,1080%100%
Plainfield, IL39,5811%20%
Oak Brook, IL7,8831%99%
Elburn, IL5,6020%100%
Romeoville, IL39,6800%9%
Wayne, IL2,4311%99%
Oakbrook Terrace, IL2,1340%100%

Largest Telephone Carriers

Landline

Prefixes Carrier
5%Peerless Network
3%Verizon Wireless
3%Local Access
3%Ameritech
3%Level 3
3%Mci Worldcom
1%Bandwidthcom Clec
11%Other

Wireless

Prefixes Carrier
20%Verizon Wireless
15%Sprint
11%T-mobile
8%Cricket
4%Cingular
3%Bandwidthcom Clec
1%Level 3
1%Other

Prefixes

Assigned

Usage


Prefix
Usage
Primary City
Carrier
Introduced
(331) 200-
Bartlett
T-mobile Usa
07/11/2011
(331) 201-
Downers Grove
Cellco Partnership DBA Verizon Wireless
01/06/2012
(331) 202-
Elmhurst
Sprint Spectrum
01/17/2012
(331) 203-
Aurora
Sprint Spectrum
10/12/2011
(331) 204-
Bartlett
Broadvox-clec
07/29/2013
(331) 205-
Aurora
T-mobile Usa
10/21/2011
(331) 206-
Aurora
Sprint Spectrum
10/12/2011
(331) 207-
Yorkville
Level 3 Communications
11/01/2011
(331) 208-
Aurora
Sprint Spectrum
11/08/2011
(331) 209-
Elmhurst
Level 3 Communications
01/17/2012
(331) 210-
Saint Charles
Peerless Network Of Illinois
03/06/2012
(331) 212-
Aurora
Mci Worldcom Communications
04/05/2012
(331) 213-
Naperville
Cellco Partnership DBA Verizon Wireless
09/06/2011
(331) 214-
Downers Grove
Cellco Partnership DBA Verizon Wireless
06/20/2012
(331) 215-
Naperville
Cellco Partnership DBA Verizon Wireless
09/28/2012
(331) 216-
Oswego
New Cingular Wireless PCS
10/31/2012
(331) 218-
Wheaton
T-mobile Usa
07/09/2013
(331) 220-
Aurora
Sprint Spectrum
07/12/2011
(331) 221-
Elmhurst
Ameritech Illinois
01/21/2009
(331) 222-
Saint Charles
Cricket Communications
10/28/2008
(331) 223-
Saint Charles
Cricket Communications
10/28/2008
(331) 225-
Elmhurst
Sprint Spectrum
08/22/2011
(331) 228-
Saint Charles
Ovation Communications Of Illinois
09/21/2011
(331) 229-
Naperville
Cellco Partnership DBA Verizon Wireless
11/27/2012
(331) 234-
Sugar Grove
Cellco Partnership DBA Verizon Wireless
07/08/2013
(331) 240-
West Chicago
Peerless Network Of Illinois
04/10/2013
(331) 245-
Bartlett
T-mobile Usa
04/18/2013
(331) 248-
Geneva
Comcast Phone Of Illinois DBA Comco
07/06/2007
(331) 250-
Aurora
T-mobile Usa
04/10/2012
(331) 251-
Downers Grove
Cellco Partnership DBA Verizon Wireless
12/05/2012
(331) 254-
T-mobile Usa
07/16/2014
(331) 256-
Aurora
Cellco Partnership DBA Verizon Wireless
09/13/2011
(331) 262-
Aurora
Sprint Spectrum
07/30/2008
(331) 281-
Naperville
Ameritech Illinois
10/25/2012
(331) 301-
Aurora
Local Access LLC
03/13/2013
(331) 302-
Aurora
Cellco Partnership DBA Verizon Wireless
02/11/2013
(331) 303-
Elburn
Cibolo Creek Ventures DBA Routepoint Comm Il
04/22/2013
(331) 305-
Naperville
Cellco Partnership DBA Verizon Wireless
08/15/2013
(331) 318-
Lemont
Local Access LLC
08/01/2013
(331) 330-
Oswego
Cricket Communications
08/19/2008
(331) 332-
Naperville
Cricket Communications
11/03/2008
(331) 333-
Naperville
Cricket Communications
11/03/2008
(331) 422-
Saint Charles
Level 3 Communications
11/13/2008
(331) 425-
Aurora
T-mobile Usa
07/11/2007
(331) 431-
Aurora
Bandwidth.com Clec
05/26/2010
(331) 442-
Saint Charles
Cellco Partnership DBA Verizon Wireless
10/30/2008
(331) 444-
Naperville
Cellco Partnership DBA Verizon Wireless
08/04/2010
(331) 452-
Aurora
Cellco Partnership DBA Verizon Wireless
09/20/2007
(331) 454-
Aurora
Cricket Communications
05/07/2009
(331) 456-
Roselle
First Communications LLC
12/05/2007
(331) 457-
Naperville
Cellco Partnership DBA Verizon Wireless
11/14/2008
(331) 462-
Lombard
Xo Illinois
08/23/2008
(331) 465-
West Chicago
New Cingular Wireless PCS
10/17/2007
(331) 472-
Naperville
T-mobile Usa
10/22/2008
(331) 481-
Downers Grove
Cellco Partnership DBA Verizon Wireless
10/29/2008
(331) 551-
Lombard
Cricket Communications
11/05/2008
(331) 575-
Aurora
Sprint Spectrum
09/18/2007
(331) 588-
Saint Charles
New Cingular Wireless PCS
02/15/2010
(331) 625-
Downers Grove
Cellco Partnership DBA Verizon Wireless
10/16/2009
(331) 642-
Elmhurst
Bandwidth.com Clec
06/19/2008
(331) 643-
Aurora
Sprint Spectrum
09/18/2007
(331) 645-
Elmhurst
Sprint Spectrum
11/05/2007
(331) 684-
Aurora
Sigecom
07/12/2007
(331) 702-
Naperville
Mci Worldcom Communications
10/23/2013
(331) 703-
West Chicago
T-mobile Usa
10/24/2013
(331) 725-
Oswego
New Cingular Wireless PCS
05/19/2009
(331) 777-
Downers Grove
Cellco Partnership DBA Verizon Wireless
09/22/2010
(331) 801-
Teleport Communications America
05/15/2014
(331) 803-
Lemont
Peerless Network Of Illinois
04/10/2013
(331) 825-
Digital Network Access Communications
11/08/2007
(331) 826-
Elmhurst
Sprint Spectrum
11/18/2008
(331) 888-
Warrenville
Peerless Network Of Illinois
09/24/2010
(331) 903-
Sbc Internet Services
05/15/2014
(331) 999-
Oswego
Bandwidth.com Clec
09/22/2010

Heavily Reported Numbers

Phone complaint data powered by CallerCenter.com


Sources: North American Numbering Plan Administration (NANPA), telecom providers, and the U.S. Census Bureau.