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Information for area code 331

Rate centers:

BARTLETT , AURORA , YORKVILLE , NAPERVILLE , ELMHURST , ST CHARLES , SUGARGROVE , GENEVA , ROSELLE , LOMBARD , W CHICAGO , DOWNERSGRV , OSWEGO , WARRENVL

Companies:

T-MOBILE USA, INC. , SPRINT SPECTRUM L.P. , LEVEL 3 COMMUNICATIONS, LLC , CELLCO PARTNERSHIP DBA VERIZON WIRELESS , NEW CINGULAR WIRELESS PCS, LLC , AMERITECH ILLINOIS , DENALI SPECTRUM LICENSE, LLC , BANDWIDTH.COM CLEC, LLC , PEERLESS NETWORK OF ILLINOIS, LLC , COMCAST PHONE OF ILLINOIS, LLC DBA COMCO , NEXTEL COMMUNICATIONS, INC. , MCI WORLDCOM COMMUNICATIONS, INC. , YMAX COMMUNICATIONS CORP. , GLOBAL CROSSING LOCAL SERVICES, INC. , BROADWING COMMUNICATIONS, LLC , US XCHANGE OF ILLINOIS LLC DBA CHOICE ONE COMM IL , CYGNUS TELECOMMUNICATIONS CORPORATION , CBEYOND COMMUNICATIONS, LLC , GLOBALCOM, INC. , ALLEGIANCE TELECOM, INC. , CIMCO COMMUNICATIONS, INC. , XO ILLINOIS, INC. , PAETEC COMMUNICATIONS, INC. , ACCESS ONE, INC. , SIGECOM, LLC , OVATION COMMUNICATIONS OF ILLINOIS, INC. , DIGITAL NETWORK ACCESS COMMUNICATIONS, INC.

List of 331 Area-Code Phone Number Prefixes