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331 Area Code

Area Code 331 Details

State: Illinois
Major City: Elmhurst
Timezone: Central
Current time: 3:38am
Short URL: allareacodes.com/331
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Area Code 331 Map

Click Here for a Printable Map: 331 Area Code Map

Major Cities in Area Code 331

  • Addison, IL
  • Aurora, IL
  • Bartlett, IL
  • Batavia, IL
  • Bensenville, IL
  • Bloomingdale, IL
  • Bolingbrook, IL
  • Carol Stream, IL
  • Darien, IL
  • Downers Grove, IL
  • Elmhurst, IL
  • Glen Ellyn, IL
  • Glendale Heights, IL
  • Hanover Park, IL
  • Lisle, IL
  • Lombard, IL
  • Naperville, IL
  • Roselle, IL
  • St. Charles, IL
  • Streamwood, IL
  • Villa Park, IL
  • West Chicago, IL
  • Westmont, IL
  • Wheaton, IL
  • Woodridge, IL

Recent Changes for the 331 Area Code

Date Change
1/21/2009 Area code 331 was put into service when (331) 221- was introduced as the first prefix.

Area Code 331 Prefixes

Prefix Primary City Company County Usage Introduced
(331) 200- T-mobile Usa Unknown 07/11/2011
(331) 220- Sprint Spectrum L.p. Unknown 07/12/2011
(331) 221- Elmhurst, IL Ameritech Illinois Unknown 01/21/2009
(331) 222- Saint Charles, IL Denali Spectrum License Unknown 10/28/2008
(331) 223- Saint Charles, IL Denali Spectrum License Unknown 10/28/2008
(331) 248- Geneva, IL Comcast Phone Of Illinois DBA Comco Unknown 07/06/2007
(331) 262- Aurora, IL Sprint Spectrum L.p. Unknown 07/30/2008
(331) 330- Oswego, IL Denali Spectrum License Unknown
(331) 332- Naperville, IL Denali Spectrum License Unknown 11/03/2008
(331) 333- Naperville, IL Denali Spectrum License Unknown 11/03/2008
(331) 422- Saint Charles, IL Level 3 Communications Unknown 11/13/2008
(331) 425- Aurora, IL T-mobile Usa Unknown 07/11/2007
(331) 431- Aurora, IL Bandwidth.com Clec Unknown 05/26/2010
(331) 442- Saint Charles, IL Cellco Partnership DBA Verizon Wireless Unknown 10/30/2008
(331) 444- Naperville, IL Cygnus Telecommunications Corporation Unknown 08/04/2010
(331) 452- Aurora, IL Cellco Partnership DBA Verizon Wireless Unknown 09/20/2007
(331) 454- Aurora, IL Denali Spectrum License Unknown 05/07/2009
(331) 456- Roselle, IL Globalcom-il Unknown 12/05/2007
(331) 457- Naperville, IL Cellco Partnership DBA Verizon Wireless Unknown 11/14/2008
(331) 462- Lombard, IL Xo Illinois Unknown 08/23/2008
(331) 465- West Chicago, IL New Cingular Wireless PCS Unknown 10/17/2007
(331) 472- Naperville, IL T-mobile Usa Unknown 10/22/2008
(331) 481- Downers Grove, IL Cellco Partnership DBA Verizon Wireless Unknown 10/29/2008
(331) 551- Lombard, IL Denali Spectrum License Unknown 11/05/2008
(331) 552- Unknown 11/05/2008
(331) 553- Unknown 11/05/2008
(331) 575- Aurora, IL Sprint Spectrum L.p. Unknown 09/18/2007
(331) 588- Saint Charles, IL New Cingular Wireless PCS Unknown 02/15/2010
(331) 591- Elmhurst, IL Unknown 09/28/2007
(331) 625- Downers Grove, IL Cellco Partnership DBA Verizon Wireless Unknown 10/16/2009
(331) 642- Elmhurst, IL Bandwidth.com Clec Unknown 06/19/2008
(331) 643- Aurora, IL Sprint Spectrum L.p. Unknown 09/18/2007
(331) 645- Elmhurst, IL Sprint Spectrum L.p. Unknown 11/05/2007
(331) 684- Aurora, IL Sigecom Unknown 07/12/2007
(331) 725- Oswego, IL New Cingular Wireless PCS Unknown 05/19/2009
(331) 777- Downers Grove, IL Cygnus Telecommunications Corporation Unknown 09/22/2010
(331) 825- Geneva, IL Digital Network Access Communications Unknown 11/08/2007
(331) 826- Elmhurst, IL Sprint Spectrum L.p. Unknown 11/18/2008
(331) 888- Warrenville, IL Cygnus Telecommunications Corporation Unknown 09/24/2010
(331) 999- Oswego, IL Cygnus Telecommunications Corporation Unknown 09/22/2010

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