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331 Area Code

N IllinoisJanuary 20, 2019
   
Area Code: 331
State/Region: N Illinois
Major Cities: western suburbs of Chicago
   
Time Zone: Central
Current Time: 1:37 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, IL T-MOBILE USA, INC. 2011-07-11
331-201DOWNERSGRV, IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 2012-01-06
331-202ELMHURST, IL SPRINT SPECTRUM L.P. 2012-01-17
331-203AURORA, IL SPRINT SPECTRUM L.P. 2011-10-12
331-205AURORA, IL T-MOBILE USA, INC. 2011-10-21
331-206AURORA, IL SPRINT SPECTRUM L.P. 2011-10-12
331-207YORKVILLE, IL LEVEL 3 COMMUNICATIONS, LLC - IL 2011-11-01
331-208AURORA, IL SPRINT SPECTRUM L.P. 2011-11-08
331-209ELMHURST, IL SPRINT SPECTRUM L.P. 2012-01-17
331-210ST CHARLES, IL PEERLESS NETWORK OF ILLINOIS, LLC - IL 2012-03-06
331-211
331-212AURORA, IL MCI WORLDCOM COMMUNICATIONS, INC. - IL 2012-04-05
331-213NAPERVILLE, IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 2011-09-06
331-217
331-220AURORA, IL SPRINT SPECTRUM L.P. 2011-07-12
331-221ELMHURST, IL AMERITECH ILLINOIS 2009-01-21
331-222ST CHARLES, IL DENALI SPECTRUM LICENSE, LLC 2008-10-28
331-223ST CHARLES, IL DENALI SPECTRUM LICENSE, LLC 2008-10-28
331-224
331-225ELMHURST, IL SPRINT SPECTRUM L.P. 2011-08-22
331-227SUGARGROVE, IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 2011-08-11
331-228ST CHARLES, IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 2011-09-21
331-248GENEVA, IL COMCAST PHONE OF ILLINOIS, LLC DBA COMCO - IL 2007-07-06
331-256AURORA, IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 2011-09-13
331-262AURORA, IL SPRINT SPECTRUM L.P. 2008-07-30
331-309
331-311
331-312
331-330NAPERVILLE, IL DENALI SPECTRUM LICENSE, LLC 2008-08-19
331-331
331-332NAPERVILLE, IL DENALI SPECTRUM LICENSE, LLC 2008-11-03
331-333NAPERVILLE, IL DENALI SPECTRUM LICENSE, LLC 2008-11-03
331-411
331-422ST CHARLES, IL LEVEL 3 COMMUNICATIONS, LLC - IL 2008-11-13
331-425AURORA, IL T-MOBILE USA, INC. 2007-07-11
331-431AURORA, IL BANDWIDTH.COM CLEC, LLC - IL 2010-05-26
331-442ST CHARLES, IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 2008-10-30
331-444NAPERVILLE, IL CYGNUS TELECOMMUNICATIONS CORPORATION - IL 2010-08-04
331-452AURORA, IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 2007-09-20
331-454AURORA, IL DENALI SPECTRUM LICENSE, LLC 2009-05-07
331-456ROSELLE, IL GLOBALCOM, INC.-IL 2007-12-05
331-457NAPERVILLE, IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 2008-11-14
331-462LOMBARD, IL XO ILLINOIS, INC. 2008-08-23
331-465W CHICAGO, IL NEW CINGULAR WIRELESS PCS, LLC - IL 2007-10-17
331-472NAPERVILLE, IL T-MOBILE USA, INC. 2008-10-22
331-481DOWNERSGRV, IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 2008-10-29
331-511
331-551LOMBARD, IL DENALI SPECTRUM LICENSE, LLC 2008-11-05
331-555
331-575AURORA, IL SPRINT SPECTRUM L.P. 2007-09-18
331-588ST CHARLES, IL NEW CINGULAR WIRELESS PCS, LLC - IL 2010-02-15
331-591
331-611
331-618
331-625DOWNERSGRV, IL CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 2009-10-16
331-630
331-642ELMHURST, IL BANDWIDTH.COM CLEC, LLC - IL
331-643AURORA, IL SPRINT SPECTRUM L.P. 2007-09-18
331-645ELMHURST, IL SPRINT SPECTRUM L.P. 2007-11-05
331-684AURORA, IL SIGECOM, LLC - IL 2007-07-12
331-700
331-708
331-711
331-725OSWEGO, IL NEW CINGULAR WIRELESS PCS, LLC - IL
331-773
331-777DOWNERSGRV, IL CYGNUS TELECOMMUNICATIONS CORPORATION - IL 2010-09-22
331-779
331-811
331-815
331-825GENEVA, IL DIGITAL NETWORK ACCESS COMMUNICATIONS, INC. - IL 2007-11-08
331-826ELMHURST, IL SPRINT SPECTRUM L.P. 2008-11-18
331-847
331-872
331-888WARRENVL, IL CYGNUS TELECOMMUNICATIONS CORPORATION - IL 2010-09-24
331-911
331-950
331-958AMERITECH ILLINOIS
331-959AMERITECH ILLINOIS
331-976
331-999OSWEGO, IL CYGNUS TELECOMMUNICATIONS CORPORATION - IL 2010-09-22
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