331 Area Code

State: Illinois

Major City: Springfield

  • Admission to Statehood:
    December 3, 1818 (21st State)
  • Constitution:
    Illinois's Constitution , 21st State
  • Nickname:
    Prairie State
  • Population (2013):
    12,882,135; Rank: 5 of 50 | Population Quick Facts

Area:

  • Area: 57,918 sq.mi (150,007 sq.km.), 25th
  • Land: 55,593 sq.mi. (143,985 sq.km.), 24th
  • Water: 2,325 sq.mi. (6,022 sq.km.), 20th
  • Great Lakes: 2,546 sq.mi. (6,594 sq.km.),tied for 5th

Area Code 331

Map:

Area Code Prefix Usage Primary City Carrier Introduced
331 (331) 200- Wireless Bartlett T-mobile Usa 07/11/2011
331 (331) 201- Wireless Downers Grove Cellco Partnership DBA Verizon Wireless 01/06/2012
331 (331) 202- Wireless Elmhurst Sprint Spectrum L.p. 01/17/2012
331 (331) 203- Wireless Aurora Sprint Spectrum L.p. 10/12/2011
331 (331) 204- Landline Bartlett Broadvox-clec 07/29/2013
331 (331) 205- Wireless Aurora T-mobile Usa 10/21/2011
331 (331) 206- Wireless Aurora Sprint Spectrum L.p. 10/12/2011
331 (331) 207- Landline Yorkville Level 3 Communications 11/01/2011
331 (331) 208- Wireless Aurora Sprint Spectrum L.p. 11/08/2011
331 (331) 209- Wireless Elmhurst Level 3 Communications 01/17/2012
331 (331) 210- Landline Saint Charles Peerless Network Of Illinois 03/06/2012
331 (331) 212- Landline Aurora Mci Worldcom Communications 04/05/2012
331 (331) 213- Wireless Naperville Cellco Partnership DBA Verizon Wireless 09/06/2011
331 (331) 214- Wireless Downers Grove Cellco Partnership DBA Verizon Wireless 06/20/2012
331 (331) 215- Wireless Naperville Cellco Partnership DBA Verizon Wireless 09/28/2012
331 (331) 216- Wireless Oswego New Cingular Wireless PCS 10/31/2012
331 (331) 218- Wireless Wheaton T-mobile Usa 07/09/2013
331 (331) 220- Wireless Aurora Sprint Spectrum L.p. 07/12/2011
331 (331) 221- Landline Elmhurst Ameritech Illinois 01/21/2009
331 (331) 222- Wireless Saint Charles Cricket Communications 10/28/2008
331 (331) 223- Wireless Saint Charles Cricket Communications 10/28/2008
331 (331) 225- Wireless Elmhurst Sprint Spectrum L.p. 08/22/2011
331 (331) 228- Wireless Saint Charles Ovation Communications Of Illinois 09/21/2011
331 (331) 229- Wireless Naperville Cellco Partnership DBA Verizon Wireless 11/27/2012
331 (331) 234- Wireless Sugar Grove Cellco Partnership DBA Verizon Wireless 07/08/2013
331 (331) 240- Landline West Chicago Peerless Network Of Illinois 04/10/2013
331 (331) 245- Wireless Bartlett T-mobile Usa 04/18/2013
331 (331) 248- Landline Geneva Comcast Phone Of Illinois DBA Comco 07/06/2007
331 (331) 250- Wireless Aurora T-mobile Usa 04/10/2012
331 (331) 251- Wireless Downers Grove Cellco Partnership DBA Verizon Wireless 12/05/2012
331 (331) 254- Unknown T-mobile Usa 07/16/2014
331 (331) 256- Wireless Aurora Cellco Partnership DBA Verizon Wireless 09/13/2011
331 (331) 262- Wireless Aurora Sprint Spectrum L.p. 07/30/2008
331 (331) 281- Landline Naperville Ameritech Illinois 10/25/2012
331 (331) 301- Landline Aurora Local Access LLC 03/13/2013
331 (331) 302- Wireless Aurora Cellco Partnership DBA Verizon Wireless 02/11/2013
331 (331) 303- Landline Elburn Cibolo Creek Ventures DBA Routepoint Comm Il 04/22/2013
331 (331) 305- Wireless Naperville Cellco Partnership DBA Verizon Wireless 08/15/2013
331 (331) 318- Landline Lemont Local Access LLC 08/01/2013
331 (331) 330- Landline Oswego Cricket Communications 08/19/2008
331 (331) 332- Wireless Naperville Cricket Communications 11/03/2008
331 (331) 333- Wireless Naperville Cricket Communications 11/03/2008
331 (331) 422- Landline Saint Charles Level 3 Communications 11/13/2008
331 (331) 425- Wireless Aurora T-mobile Usa 07/11/2007
331 (331) 431- Wireless Aurora Bandwidth.com Clec 05/26/2010
331 (331) 442- Wireless Saint Charles Cellco Partnership DBA Verizon Wireless 10/30/2008
331 (331) 444- Landline Naperville Cellco Partnership DBA Verizon Wireless 08/04/2010
331 (331) 452- Wireless Aurora Cellco Partnership DBA Verizon Wireless 09/20/2007
331 (331) 454- Wireless Aurora Cricket Communications 05/07/2009
331 (331) 456- Landline Roselle First Communications LLC 12/05/2007
Area Code: 331
Prefix: (331) 200-
Usage: Wireless
Primary City: Bartlett
Carrier: T-mobile Usa
Introduced: 07/11/2011
Area Code: 331
Prefix: (331) 201-
Usage: Wireless
Primary City: Downers Grove
Carrier: Cellco Partnership DBA Verizon Wireless
Introduced: 01/06/2012
Area Code: 331
Prefix: (331) 202-
Usage: Wireless
Primary City: Elmhurst
Carrier: Sprint Spectrum L.p.
Introduced: 01/17/2012
Area Code: 331
Prefix: (331) 203-
Usage: Wireless
Primary City: Aurora
Carrier: Sprint Spectrum L.p.
Introduced: 10/12/2011
Area Code: 331
Prefix: (331) 204-
Usage: Landline
Primary City: Bartlett
Carrier: Broadvox-clec
Introduced: 07/29/2013
Area Code: 331
Prefix: (331) 205-
Usage: Wireless
Primary City: Aurora
Carrier: T-mobile Usa
Introduced: 10/21/2011
Area Code: 331
Prefix: (331) 206-
Usage: Wireless
Primary City: Aurora
Carrier: Sprint Spectrum L.p.
Introduced: 10/12/2011
Area Code: 331
Prefix: (331) 207-
Usage: Landline
Primary City: Yorkville
Carrier: Level 3 Communications
Introduced: 11/01/2011
Area Code: 331
Prefix: (331) 208-
Usage: Wireless
Primary City: Aurora
Carrier: Sprint Spectrum L.p.
Introduced: 11/08/2011
Area Code: 331
Prefix: (331) 209-
Usage: Wireless
Primary City: Elmhurst
Carrier: Level 3 Communications
Introduced: 01/17/2012
Area Code: 331
Prefix: (331) 210-
Usage: Landline
Primary City: Saint Charles
Carrier: Peerless Network Of Illinois
Introduced: 03/06/2012
Area Code: 331
Prefix: (331) 212-
Usage: Landline
Primary City: Aurora
Carrier: Mci Worldcom Communications
Introduced: 04/05/2012
Area Code: 331
Prefix: (331) 213-
Usage: Wireless
Primary City: Naperville
Carrier: Cellco Partnership DBA Verizon Wireless
Introduced: 09/06/2011
Area Code: 331
Prefix: (331) 214-
Usage: Wireless
Primary City: Downers Grove
Carrier: Cellco Partnership DBA Verizon Wireless
Introduced: 06/20/2012
Area Code: 331
Prefix: (331) 215-
Usage: Wireless
Primary City: Naperville
Carrier: Cellco Partnership DBA Verizon Wireless
Introduced: 09/28/2012
Area Code: 331
Prefix: (331) 216-
Usage: Wireless
Primary City: Oswego
Carrier: New Cingular Wireless PCS
Introduced: 10/31/2012
Area Code: 331
Prefix: (331) 218-
Usage: Wireless
Primary City: Wheaton
Carrier: T-mobile Usa
Introduced: 07/09/2013
Area Code: 331
Prefix: (331) 220-
Usage: Wireless
Primary City: Aurora
Carrier: Sprint Spectrum L.p.
Introduced: 07/12/2011
Area Code: 331
Prefix: (331) 221-
Usage: Landline
Primary City: Elmhurst
Carrier: Ameritech Illinois
Introduced: 01/21/2009
Area Code: 331
Prefix: (331) 222-
Usage: Wireless
Primary City: Saint Charles
Carrier: Cricket Communications
Introduced: 10/28/2008
Area Code: 331
Prefix: (331) 223-
Usage: Wireless
Primary City: Saint Charles
Carrier: Cricket Communications
Introduced: 10/28/2008
Area Code: 331
Prefix: (331) 225-
Usage: Wireless
Primary City: Elmhurst
Carrier: Sprint Spectrum L.p.
Introduced: 08/22/2011
Area Code: 331
Prefix: (331) 228-
Usage: Wireless
Primary City: Saint Charles
Carrier: Ovation Communications Of Illinois
Introduced: 09/21/2011
Area Code: 331
Prefix: (331) 229-
Usage: Wireless
Primary City: Naperville
Carrier: Cellco Partnership DBA Verizon Wireless
Introduced: 11/27/2012
Area Code: 331
Prefix: (331) 234-
Usage: Wireless
Primary City: Sugar Grove
Carrier: Cellco Partnership DBA Verizon Wireless
Introduced: 07/08/2013
Area Code: 331
Prefix: (331) 240-
Usage: Landline
Primary City: West Chicago
Carrier: Peerless Network Of Illinois
Introduced: 04/10/2013
Area Code: 331
Prefix: (331) 245-
Usage: Wireless
Primary City: Bartlett
Carrier: T-mobile Usa
Introduced: 04/18/2013
Area Code: 331
Prefix: (331) 248-
Usage: Landline
Primary City: Geneva
Carrier: Comcast Phone Of Illinois DBA Comco
Introduced: 07/06/2007
Area Code: 331
Prefix: (331) 250-
Usage: Wireless
Primary City: Aurora
Carrier: T-mobile Usa
Introduced: 04/10/2012
Area Code: 331
Prefix: (331) 251-
Usage: Wireless
Primary City: Downers Grove
Carrier: Cellco Partnership DBA Verizon Wireless
Introduced: 12/05/2012
Area Code: 331
Prefix: (331) 254-
Usage: Unknown
Primary City:
Carrier: T-mobile Usa
Introduced: 07/16/2014
Area Code: 331
Prefix: (331) 256-
Usage: Wireless
Primary City: Aurora
Carrier: Cellco Partnership DBA Verizon Wireless
Introduced: 09/13/2011
Area Code: 331
Prefix: (331) 262-
Usage: Wireless
Primary City: Aurora
Carrier: Sprint Spectrum L.p.
Introduced: 07/30/2008
Area Code: 331
Prefix: (331) 281-
Usage: Landline
Primary City: Naperville
Carrier: Ameritech Illinois
Introduced: 10/25/2012
Area Code: 331
Prefix: (331) 301-
Usage: Landline
Primary City: Aurora
Carrier: Local Access LLC
Introduced: 03/13/2013
Area Code: 331
Prefix: (331) 302-
Usage: Wireless
Primary City: Aurora
Carrier: Cellco Partnership DBA Verizon Wireless
Introduced: 02/11/2013
Area Code: 331
Prefix: (331) 303-
Usage: Landline
Primary City: Elburn
Carrier: Cibolo Creek Ventures DBA Routepoint Comm Il
Introduced: 04/22/2013
Area Code: 331
Prefix: (331) 305-
Usage: Wireless
Primary City: Naperville
Carrier: Cellco Partnership DBA Verizon Wireless
Introduced: 08/15/2013
Area Code: 331
Prefix: (331) 318-
Usage: Landline
Primary City: Lemont
Carrier: Local Access LLC
Introduced: 08/01/2013
Area Code: 331
Prefix: (331) 330-
Usage: Landline
Primary City: Oswego
Carrier: Cricket Communications
Introduced: 08/19/2008
Area Code: 331
Prefix: (331) 332-
Usage: Wireless
Primary City: Naperville
Carrier: Cricket Communications
Introduced: 11/03/2008
Area Code: 331
Prefix: (331) 333-
Usage: Wireless
Primary City: Naperville
Carrier: Cricket Communications
Introduced: 11/03/2008
Area Code: 331
Prefix: (331) 422-
Usage: Landline
Primary City: Saint Charles
Carrier: Level 3 Communications
Introduced: 11/13/2008
Area Code: 331
Prefix: (331) 425-
Usage: Wireless
Primary City: Aurora
Carrier: T-mobile Usa
Introduced: 07/11/2007
Area Code: 331
Prefix: (331) 431-
Usage: Wireless
Primary City: Aurora
Carrier: Bandwidth.com Clec
Introduced: 05/26/2010
Area Code: 331
Prefix: (331) 442-
Usage: Wireless
Primary City: Saint Charles
Carrier: Cellco Partnership DBA Verizon Wireless
Introduced: 10/30/2008
Area Code: 331
Prefix: (331) 444-
Usage: Landline
Primary City: Naperville
Carrier: Cellco Partnership DBA Verizon Wireless
Introduced: 08/04/2010
Area Code: 331
Prefix: (331) 452-
Usage: Wireless
Primary City: Aurora
Carrier: Cellco Partnership DBA Verizon Wireless
Introduced: 09/20/2007
Area Code: 331
Prefix: (331) 454-
Usage: Wireless
Primary City: Aurora
Carrier: Cricket Communications
Introduced: 05/07/2009
Area Code: 331
Prefix: (331) 456-
Usage: Landline
Primary City: Roselle
Carrier: First Communications LLC
Introduced: 12/05/2007