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331 Area Code

N IllinoisFebruary 6, 2018
Area Code: 331
State/Region: N Illinois
Major Cities: western suburbs of Chicago
Time Zone: Central
Current Time: 5:06 AM
Date Assigned: 7/23/1999
In Service Since: 10/7/2007
Overlay?: Yes
Overlay Complex: 630/331
Local Call Dialing: 1+10D
Toll Call Dialing: 1+10D

Nxx Exchange

location

Company

Assigned

331-200BARTLETT, ILT-MOBILE USA, INC.2011-07-11
331-201DOWNERSGRV, ILCELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL2012-01-06
331-202ELMHURST, ILSPRINT SPECTRUM L.P.2012-01-17
331-203AURORA, ILSPRINT SPECTRUM L.P.2011-10-12
331-205AURORA, ILT-MOBILE USA, INC.2011-10-21
331-206AURORA, ILSPRINT SPECTRUM L.P.2011-10-12
331-207YORKVILLE, ILLEVEL 3 COMMUNICATIONS, LLC - IL2011-11-01
331-208AURORA, ILSPRINT SPECTRUM L.P.2011-11-08
331-209ELMHURST, ILSPRINT SPECTRUM L.P.2012-01-17
331-210ST CHARLES, ILPEERLESS NETWORK OF ILLINOIS, LLC - IL2012-03-06
331-211
331-212AURORA, ILMCI WORLDCOM COMMUNICATIONS, INC. - IL2012-04-05
331-213NAPERVILLE, ILCELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL2011-09-06
331-217
331-220AURORA, ILSPRINT SPECTRUM L.P.2011-07-12
331-221ELMHURST, ILAMERITECH ILLINOIS2009-01-21
331-222ST CHARLES, ILDENALI SPECTRUM LICENSE, LLC2008-10-28
331-223ST CHARLES, ILDENALI SPECTRUM LICENSE, LLC2008-10-28
331-224
331-225ELMHURST, ILSPRINT SPECTRUM L.P.2011-08-22
331-227SUGARGROVE, ILCELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL2011-08-11
331-228ST CHARLES, ILCELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL2011-09-21
331-248GENEVA, ILCOMCAST PHONE OF ILLINOIS, LLC DBA COMCO - IL2007-07-06
331-256AURORA, ILCELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL2011-09-13
331-262AURORA, ILSPRINT SPECTRUM L.P.2008-07-30
331-309
331-311
331-312
331-330NAPERVILLE, ILDENALI SPECTRUM LICENSE, LLC2008-08-19
331-331
331-332NAPERVILLE, ILDENALI SPECTRUM LICENSE, LLC2008-11-03
331-333NAPERVILLE, ILDENALI SPECTRUM LICENSE, LLC2008-11-03
331-411
331-422ST CHARLES, ILLEVEL 3 COMMUNICATIONS, LLC - IL2008-11-13
331-425AURORA, ILT-MOBILE USA, INC.2007-07-11
331-431AURORA, ILBANDWIDTH.COM CLEC, LLC - IL2010-05-26
331-442ST CHARLES, ILCELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL2008-10-30
331-444NAPERVILLE, ILCYGNUS TELECOMMUNICATIONS CORPORATION - IL2010-08-04
331-452AURORA, ILCELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL2007-09-20
331-454AURORA, ILDENALI SPECTRUM LICENSE, LLC2009-05-07
331-456ROSELLE, ILGLOBALCOM, INC.-IL2007-12-05
331-457NAPERVILLE, ILCELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL2008-11-14
331-462LOMBARD, ILXO ILLINOIS, INC.2008-08-23
331-465W CHICAGO, ILNEW CINGULAR WIRELESS PCS, LLC - IL2007-10-17
331-472NAPERVILLE, ILT-MOBILE USA, INC.2008-10-22
331-481DOWNERSGRV, ILCELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL2008-10-29
331-511
331-551LOMBARD, ILDENALI SPECTRUM LICENSE, LLC2008-11-05
331-555
331-575AURORA, ILSPRINT SPECTRUM L.P.2007-09-18
331-588ST CHARLES, ILNEW CINGULAR WIRELESS PCS, LLC - IL2010-02-15
331-591
331-611
331-618
331-625DOWNERSGRV, ILCELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL2009-10-16
331-630
331-642ELMHURST, ILBANDWIDTH.COM CLEC, LLC - IL
331-643AURORA, ILSPRINT SPECTRUM L.P.2007-09-18
331-645ELMHURST, ILSPRINT SPECTRUM L.P.2007-11-05
331-684AURORA, ILSIGECOM, LLC - IL2007-07-12
331-700
331-708
331-711
331-725OSWEGO, ILNEW CINGULAR WIRELESS PCS, LLC - IL
331-773
331-777DOWNERSGRV, ILCYGNUS TELECOMMUNICATIONS CORPORATION - IL2010-09-22
331-779
331-811
331-815
331-825GENEVA, ILDIGITAL NETWORK ACCESS COMMUNICATIONS, INC. - IL2007-11-08
331-826ELMHURST, ILSPRINT SPECTRUM L.P.2008-11-18
331-847
331-872
331-888WARRENVL, ILCYGNUS TELECOMMUNICATIONS CORPORATION - IL2010-09-24
331-911
331-950
331-958AMERITECH ILLINOIS
331-959AMERITECH ILLINOIS
331-976
331-999OSWEGO, ILCYGNUS TELECOMMUNICATIONS CORPORATION - IL2010-09-22
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