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Area Code (331) Illinois, USA

Area Code:331
State: Illinois (IL)
Country:United States
Main Cities:Aurora, IL
Naperville, IL
Saint Charles, IL
Elmhurst, IL
Downers Grove, IL
Oswego, IL

Area Code (331) serves 17 Cities:

Aurora, Naperville, Saint Charles, Elmhurst, Downers Grove, Oswego, Bartlett, West Chicago, Lemont, Lombard, Sugar Grove, Geneva, Yorkville, Wheaton, Elburn, Roselle and Warrenville located in the state of Illinois, United States.

Area Code (331) Illinois Counties:

Cook, Dupage, Kane and Kendall.
Area Code 331 List of Prefixes
PrefixLocationCarrier
(331) 200 BartlettILT-Mobile USA
(331) 201 Downers GroveILCellco Partnership DBA Verizon
(331) 202 ElmhurstILSprint Spectrum L.P.
(331) 203 AuroraILSprint Spectrum L.P.
(331) 204 BartlettILBroadvox - CLEC
(331) 205 AuroraILT-Mobile USA
(331) 206 AuroraILSprint Spectrum L.P.
(331) 207 YorkvilleILLevel 3 Communications
(331) 208 AuroraILSprint Spectrum L.P.
(331) 209 ElmhurstILLevel 3 Communications
(331) 210 Saint CharlesILPeerless Network of Illinois
(331) 212 AuroraILMCI Worldcom Communications
(331) 213 NapervilleILCellco Partnership DBA Verizon
(331) 214 Downers GroveILCellco Partnership DBA Verizon
(331) 215 NapervilleILCellco Partnership DBA Verizon
(331) 216 OswegoILNew Cingular Wireless PCS, LLC
(331) 218 WheatonILT-Mobile USA
(331) 220 AuroraILSprint Spectrum L.P.
(331) 221 ElmhurstILAmeritech Illinois
(331) 222 Saint CharlesILCricket Communications
(331) 223 Saint CharlesILCricket Communications
(331) 225 ElmhurstILSprint Spectrum L.P.
(331) 228 Saint CharlesILOvation Communications of Illinois
(331) 229 NapervilleILCellco Partnership DBA Verizon
(331) 234 Sugar GroveILCellco Partnership DBA Verizon
(331) 240 West ChicagoILPeerless Network of Illinois
(331) 245 BartlettILT-Mobile USA
(331) 248 GenevaILComcast Phone of Illinois DBA Comco
(331) 250 AuroraILT-Mobile USA
(331) 251 Downers GroveILCellco Partnership DBA Verizon
(331) 256 AuroraILCellco Partnership DBA Verizon
(331) 262 AuroraILSprint Spectrum L.P.
(331) 281 NapervilleILAmeritech Illinois
(331) 301 AuroraILLocal Access LLC
(331) 302 AuroraILCellco Partnership DBA Verizon
(331) 303 ElburnILCibolo Creek Ventures DBA Routepoint Comm IL
(331) 305 NapervilleILCellco Partnership DBA Verizon
(331) 318 LemontILLocal Access LLC
(331) 330 OswegoILCricket Communications
(331) 332 NapervilleILCricket Communications
(331) 333 NapervilleILCricket Communications
(331) 422 Saint CharlesILLevel 3 Communications
(331) 425 AuroraILT-Mobile USA
(331) 431 AuroraILBandwidth.com - CLEC
(331) 442 Saint CharlesILCellco Partnership DBA Verizon
(331) 444 NapervilleILCellco Partnership DBA Verizon
(331) 452 AuroraILCellco Partnership DBA Verizon
(331) 454 AuroraILCricket Communications
(331) 456 RoselleILFirst Communications LLC
(331) 457 NapervilleILCellco Partnership DBA Verizon
(331) 462 LombardILXO Communications Illinois
(331) 465 West ChicagoILNew Cingular Wireless PCS, LLC
(331) 472 NapervilleILT-Mobile USA
(331) 481 Downers GroveILCellco Partnership DBA Verizon
(331) 551 LombardILCricket Communications
(331) 575 AuroraILSprint Spectrum L.P.
(331) 588 Saint CharlesILNew Cingular Wireless PCS, LLC
(331) 625 Downers GroveILCellco Partnership DBA Verizon
(331) 642 ElmhurstILBandwidth.com - CLEC
(331) 643 AuroraILSprint Spectrum L.P.
(331) 645 ElmhurstILSprint Spectrum L.P.
(331) 684 AuroraILSigecom
(331) 702 NapervilleILMCI Worldcom Communications
(331) 703 West ChicagoILT-Mobile USA
(331) 725 OswegoILNew Cingular Wireless PCS, LLC
(331) 777 Downers GroveILCellco Partnership DBA Verizon
(331) 803 LemontILPeerless Network of Illinois
(331) 826 ElmhurstILSprint Spectrum L.P.
(331) 888 WarrenvilleILPeerless Network of Illinois
(331) 999 OswegoILBandwidth.com - CLEC