Area Code Info

331 Area Code

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Illinois Area Codes Map

Area Code Information

Area Code: 331
State: Illinois
Primary City: Aurora
Timezone: Central
State Code:

Did You Know?

Area code 331 was first put in service October 7, 2007. Currently, the largest city it serves is Aurora, IL, and it overlaps coverage areas with area code 630.

Heavily Reported Numbers

Active Phone Number Prefixes

Prefix Usage Primary City Carrier Introduced
331200 Wireless HANOVER PARK T-mobile Usa 07/11/2011
331201 Wireless DOWNERS GROVE Cellco Partnership DBA Verizon Wireless 01/06/2012
331202 Wireless ELMHURST Sprint Spectrum L.p. 01/17/2012
331203 Wireless AURORA Sprint Spectrum L.p. 10/12/2011
331204 Landline Bartlett Broadvox-clec 07/29/2013
331205 Wireless AURORA T-mobile Usa 10/21/2011
331206 Wireless AURORA Sprint Spectrum L.p. 10/12/2011
331207 Landline YORKVILLE Level 3 Communications 11/01/2011
331208 Wireless AURORA Sprint Spectrum L.p. 11/08/2011
331209 Wireless ELMHURST Level 3 Communications 01/17/2012
331210 Landline GENEVA Peerless Network Of Illinois 03/06/2012
331212 Landline AURORA Mci Worldcom Communications 04/05/2012
331213 Wireless NAPERVILLE Cellco Partnership DBA Verizon Wireless 09/06/2011
331214 Wireless DOWNERS GROVE Cellco Partnership DBA Verizon Wireless 06/20/2012
331215 Wireless NAPERVILLE Cellco Partnership DBA Verizon Wireless 09/28/2012
331216 Wireless OSWEGO New Cingular Wireless PCS 10/31/2012
331218 Wireless DUPAGE T-mobile Usa 07/09/2013
331220 Wireless AURORA Sprint Spectrum L.p. 07/12/2011
331221 Landline ELMHURST Ameritech Illinois 01/21/2009
331222 Wireless GENEVA Cricket Communications 10/28/2008
331223 Wireless GENEVA Cricket Communications 10/28/2008
331225 Wireless ELMHURST Sprint Spectrum L.p. 08/22/2011
331227 KANE
331228 Wireless GENEVA Ovation Communications Of Illinois 09/21/2011
331229 Wireless NAPERVILLE Cellco Partnership DBA Verizon Wireless 11/27/2012
331234 Wireless KANE Cellco Partnership DBA Verizon Wireless 07/08/2013
331240 Landline WEST CHICAGO Peerless Network Of Illinois 04/10/2013
331245 Wireless HANOVER PARK T-mobile Usa 04/18/2013
331248 Landline GENEVA Comcast Phone Of Illinois DBA Comco 07/06/2007
331250 Wireless AURORA T-mobile Usa 04/10/2012
331251 Wireless DOWNERS GROVE Cellco Partnership DBA Verizon Wireless 12/05/2012
331254 Unknown T-mobile Usa
331256 Wireless AURORA Cellco Partnership DBA Verizon Wireless 09/13/2011
331262 Wireless AURORA Sprint Spectrum L.p. 07/30/2008
331281 Landline NAPERVILLE Ameritech Illinois 10/25/2012
331301 Landline AURORA Local Access LLC 03/13/2013
331302 Wireless AURORA Cellco Partnership DBA Verizon Wireless 02/11/2013
331303 Landline KANE Cibolo Creek Ventures DBA Routepoint Comm Il 04/22/2013
331305 Wireless Naperville Cellco Partnership DBA Verizon Wireless 08/15/2013
331318 Landline Lemont Local Access LLC 08/01/2013
331330 Landline MONTGOMERY Cricket Communications 08/19/2008
331332 Wireless NAPERVILLE Cricket Communications 11/03/2008
331333 Wireless NAPERVILLE Cricket Communications 11/03/2008
331422 Landline GENEVA Level 3 Communications 11/13/2008
331425 Wireless AURORA T-mobile Usa 07/11/2007
331431 Wireless AURORA Bandwidth.com Clec 05/26/2010
331442 Wireless GENEVA Cellco Partnership DBA Verizon Wireless 10/30/2008
331444 Landline NAPERVILLE Cellco Partnership DBA Verizon Wireless 08/04/2010
331452 Wireless AURORA Cellco Partnership DBA Verizon Wireless 09/20/2007
331454 Wireless AURORA Cricket Communications 05/07/2009
331456 Landline ROSELLE First Communications LLC 12/05/2007
331457 Wireless NAPERVILLE Cellco Partnership DBA Verizon Wireless 11/14/2008
331462 Landline LOMBARD Xo Illinois 08/23/2008
331465 Wireless WEST CHICAGO New Cingular Wireless PCS 10/17/2007
331472 Wireless NAPERVILLE T-mobile Usa 10/22/2008
331481 Wireless DOWNERS GROVE Cellco Partnership DBA Verizon Wireless 10/29/2008
331551 Wireless LOMBARD Cricket Communications 11/05/2008
331552 DUPAGE
331553 DUPAGE
331575 Wireless AURORA Sprint Spectrum L.p. 09/18/2007
331588 Wireless GENEVA New Cingular Wireless PCS 02/15/2010
331591 ELMHURST
331625 Wireless DOWNERS GROVE Cellco Partnership DBA Verizon Wireless 10/16/2009
331642 Wireless ELMHURST Bandwidth.com Clec 06/19/2008
331643 Wireless AURORA Sprint Spectrum L.p. 09/18/2007
331645 Wireless ELMHURST Sprint Spectrum L.p. 11/05/2007
331684 Landline AURORA Sigecom 07/12/2007
331702 Landline Naperville Mci Worldcom Communications 10/23/2013
331703 Wireless West Chicago T-mobile Usa 10/24/2013
331725 Landline OSWEGO New Cingular Wireless PCS 05/19/2009
331777 Landline DOWNERS GROVE Cellco Partnership DBA Verizon Wireless 09/22/2010
331801 Unknown Teleport Communications America
331803 Landline HOMER GLEN Peerless Network Of Illinois 04/10/2013
331825 Unknown GENEVA Digital Network Access Communications
331826 Wireless ELMHURST Sprint Spectrum L.p. 11/18/2008
331888 Landline WARRENVILLE Peerless Network Of Illinois 09/24/2010
331903 Unknown Sbc Internet Services
331999 Landline OSWEGO Bandwidth.com Clec 09/22/2010