Area Code | Prefix | City/Switch Name (Click for city search) | State/Prov. Area Map | Telephone Company Web link | Telco Type | More Info |
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331 | 200 | BARTLETT | Illinois | T-MOBILE USA, INC. | WIRELESS PROV | More |
331 | 201 | DOWNERSGRV | Illinois | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | WIRELESS PROV | More |
331 | 202 | ELMHURST | Illinois | SPRINT SPECTRUM L.P. | PCS | More |
331 | 203 | AURORA | Illinois | SPRINT SPECTRUM L.P. | PCS | More |
331 | 204 | BARTLETT | Illinois | NEUTRAL TANDEM-ILLINOIS, LLC - IL | | More |
331 | 205 | AURORA | Illinois | T-MOBILE USA, INC. | WIRELESS PROV | More |
331 | 206 | AURORA | Illinois | SPRINT SPECTRUM L.P. | PCS | More |
331 | 207 | YORKVILLE | Illinois | LEVEL 3 COMMUNICATIONS, LLC - IL | CLEC | More |
331 | 208 | AURORA | Illinois | SPRINT SPECTRUM L.P. | PCS | More |
331 | 209 | ELMHURST | Illinois | SPRINT SPECTRUM L.P. | PCS | More |
331 | 209 | ELMHURST | Illinois | LEVEL 3 COMMUNICATIONS, LLC - IL | CLEC | More |
331 | 210 | ST CHARLES | Illinois | PEERLESS NETWORK OF ILLINOIS, LLC - IL | | More |
331 | 212 | AURORA | Illinois | MCI WORLDCOM COMMUNICATIONS, INC. - IL | CLEC | More |
331 | 213 | NAPERVILLE | Illinois | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | WIRELESS PROV | More |
331 | 214 | DOWNERSGRV | Illinois | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | WIRELESS PROV | More |
331 | 215 | NAPERVILLE | Illinois | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | WIRELESS PROV | More |
331 | 216 | OSWEGO | Illinois | NEW CINGULAR WIRELESS PCS, LLC - IL | WIRELESS PROV | More |
331 | 218 | WHEATON | Illinois | T-MOBILE USA, INC. | WIRELESS PROV | More |
331 | 220 | AURORA | Illinois | SPRINT SPECTRUM L.P. | PCS | More |
331 | 221 | ELMHURST | Illinois | AMERITECH ILLINOIS | RBOC | More |
331 | 222 | ST CHARLES | Illinois | NEW CINGULAR WIRELESS PCS, LLC - IL | WIRELESS PROV | More |
331 | 223 | ST CHARLES | Illinois | NEW CINGULAR WIRELESS PCS, LLC - IL | WIRELESS PROV | More |
331 | 225 | ELMHURST | Illinois | SPRINT SPECTRUM L.P. | PCS | More |
331 | 228 | ST CHARLES | Illinois | OVATION COMMUNICATIONS OF ILLINOIS, INC. | CLEC | More |
331 | 229 | NAPERVILLE | Illinois | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | WIRELESS PROV | More |
331 | 234 | SUGARGROVE | Illinois | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | WIRELESS PROV | More |
331 | 240 | W CHICAGO | Illinois | PEERLESS NETWORK OF ILLINOIS, LLC - IL | | More |
331 | 245 | BARTLETT | Illinois | T-MOBILE USA, INC. | WIRELESS PROV | More |
331 | 248 | GENEVA | Illinois | COMCAST PHONE OF ILLINOIS, LLC DBA COMCO - IL | CLEC | More |
331 | 250 | AURORA | Illinois | DENALI SPECTRUM LICENSE, LLC | | More |
331 | 250 | AURORA | Illinois | T-MOBILE USA, INC. | WIRELESS PROV | More |
331 | 251 | DOWNERSGRV | Illinois | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | WIRELESS PROV | More |
331 | 253 | LEMONT | Illinois | T-MOBILE USA, INC. | WIRELESS PROV | More |
331 | 254 | SUGARGROVE | Illinois | T-MOBILE USA, INC. | WIRELESS PROV | More |
331 | 256 | AURORA | Illinois | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | WIRELESS PROV | More |
331 | 262 | AURORA | Illinois | SPRINT SPECTRUM L.P. | PCS | More |
331 | 263 | ITASCA | Illinois | NEUTRAL TANDEM-ILLINOIS, LLC - IL | | More |
331 | 276 | ST CHARLES | Illinois | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | WIRELESS PROV | More |
331 | 281 | NAPERVILLE | Illinois | AMERITECH ILLINOIS | RBOC | More |
331 | 300 | AURORA | Illinois | T-MOBILE USA, INC. | WIRELESS PROV | More |
331 | 301 | AURORA | Illinois | LOCAL ACCESS LLC - IL | | More |
331 | 302 | AURORA | Illinois | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | WIRELESS PROV | More |
331 | 303 | ELBURN | Illinois | CIBOLO CREEK VENTURES, LLC DBA ROUTEPOINT COMM IL | | More |
331 | 304 | BARTLETT | Illinois | T-MOBILE USA, INC. | WIRELESS PROV | More |
331 | 305 | NAPERVILLE | Illinois | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | WIRELESS PROV | More |
331 | 307 | LOMBARD | Illinois | T-MOBILE USA, INC. | WIRELESS PROV | More |
331 | 308 | BARTLETT | Illinois | BANDWIDTH.COM CLEC, LLC - IL | | More |
331 | 310 | BIG ROCK | Illinois | BANDWIDTH.COM CLEC, LLC - IL | | More |
331 | 318 | LEMONT | Illinois | LOCAL ACCESS LLC - IL | | More |
331 | 321 | AURORA | Illinois | T-MOBILE USA, INC. | WIRELESS PROV | More |
331 | 330 | OSWEGO | Illinois | NEW CINGULAR WIRELESS PCS, LLC - IL | WIRELESS PROV | More |
331 | 332 | NAPERVILLE | Illinois | NEW CINGULAR WIRELESS PCS, LLC - IL | WIRELESS PROV | More |
331 | 333 | NAPERVILLE | Illinois | NEW CINGULAR WIRELESS PCS, LLC - IL | WIRELESS PROV | More |
331 | 401 | NAPERVILLE | Illinois | LEVEL 3 COMMUNICATIONS, LLC - IL | CLEC | More |
331 | 422 | ST CHARLES | Illinois | LEVEL 3 COMMUNICATIONS, LLC - IL | CLEC | More |
331 | 425 | AURORA | Illinois | T-MOBILE USA, INC. | WIRELESS PROV | More |
331 | 431 | AURORA | Illinois | BANDWIDTH.COM CLEC, LLC - IL | | More |
331 | 442 | ST CHARLES | Illinois | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | WIRELESS PROV | More |
331 | 444 | NAPERVILLE | Illinois | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | WIRELESS PROV | More |
331 | 452 | AURORA | Illinois | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | WIRELESS PROV | More |
331 | 454 | AURORA | Illinois | NEW CINGULAR WIRELESS PCS, LLC - IL | WIRELESS PROV | More |
331 | 456 | ROSELLE | Illinois | GLOBALCOM, INC.-IL | CLEC | More |
331 | 457 | NAPERVILLE | Illinois | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | WIRELESS PROV | More |
331 | 462 | LOMBARD | Illinois | XO ILLINOIS, INC. | CLEC | More |
331 | 465 | W CHICAGO | Illinois | NEW CINGULAR WIRELESS PCS, LLC - IL | WIRELESS PROV | More |
331 | 472 | NAPERVILLE | Illinois | T-MOBILE USA, INC. | WIRELESS PROV | More |
331 | 481 | DOWNERSGRV | Illinois | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | WIRELESS PROV | More |
331 | 551 | LOMBARD | Illinois | NEW CINGULAR WIRELESS PCS, LLC - IL | WIRELESS PROV | More |
331 | 575 | AURORA | Illinois | SPRINT SPECTRUM L.P. | PCS | More |
331 | 588 | ST CHARLES | Illinois | NEW CINGULAR WIRELESS PCS, LLC - IL | WIRELESS PROV | More |
331 | 625 | DOWNERSGRV | Illinois | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | WIRELESS PROV | More |
331 | 642 | ELMHURST | Illinois | BANDWIDTH.COM CLEC, LLC - IL | | More |
331 | 643 | AURORA | Illinois | SPRINT SPECTRUM L.P. | PCS | More |
331 | 645 | ELMHURST | Illinois | SPRINT SPECTRUM L.P. | PCS | More |
331 | 684 | AURORA | Illinois | SIGECOM, LLC - IL | | More |
331 | 701 | NAPERVILLE | Illinois | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | WIRELESS PROV | More |
331 | 702 | NAPERVILLE | Illinois | MCI WORLDCOM COMMUNICATIONS, INC. - IL | CLEC | More |
331 | 703 | W CHICAGO | Illinois | T-MOBILE USA, INC. | WIRELESS PROV | More |
331 | 704 | KANEVILLE | Illinois | BANDWIDTH.COM CLEC, LLC - IL | | More |
331 | 716 | WHEATON | Illinois | BROADVOX-CLEC, LLC - IL | | More |
331 | 717 | OSWEGO | Illinois | NEW CINGULAR WIRELESS PCS, LLC - IL | WIRELESS PROV | More |
331 | 725 | OSWEGO | Illinois | NEW CINGULAR WIRELESS PCS, LLC - IL | WIRELESS PROV | More |
331 | 771 | ST CHARLES | Illinois | NEUTRAL TANDEM-ILLINOIS, LLC - IL | | More |
331 | 775 | DOWNERSGRV | Illinois | COMCAST PHONE OF ILLINOIS, LLC DBA COMCO - IL | CLEC | More |
331 | 777 | DOWNERSGRV | Illinois | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | WIRELESS PROV | More |
331 | 801 | DOWNERSGRV | Illinois | TELEPORT COMMUNICATIONS GROUP - CHICAGO | CAP | More |
331 | 803 | LEMONT | Illinois | PEERLESS NETWORK OF ILLINOIS, LLC - IL | | More |
331 | 806 | WHEATON | Illinois | COMCAST PHONE OF ILLINOIS, LLC DBA COMCO - IL | CLEC | More |
331 | 808 | PLANO | Illinois | BANDWIDTH.COM CLEC, LLC - IL | | More |
331 | 814 | NAPERVILLE | Illinois | T-MOBILE USA, INC. | WIRELESS PROV | More |
331 | 825 | GENEVA | Illinois | DIGITAL NETWORK ACCESS COMMUNICATIONS, INC. - IL | | More |
331 | 826 | ELMHURST | Illinois | SPRINT SPECTRUM L.P. | PCS | More |
331 | 871 | W CHICAGO | Illinois | NEUTRAL TANDEM-ILLINOIS, LLC - IL | | More |
331 | 888 | WARRENVL | Illinois | PEERLESS NETWORK OF ILLINOIS, LLC - IL | | More |
331 | 901 | ST CHARLES | Illinois | BANDWIDTH.COM CLEC, LLC - IL | | More |
331 | 903 | DOWNERSGRV | Illinois | SBC INTERNET SERVICES, INC. | | More |
331 | 958 | | Illinois | AMERITECH ILLINOIS | RBOC | More |
331 | 959 | | Illinois | AMERITECH ILLINOIS | RBOC | More |
331 | 979 | ELMHURST | Illinois | COMCAST PHONE OF ILLINOIS, LLC DBA COMCO - IL | CLEC | More |
331 | 980 | AURORA | Illinois | T-MOBILE USA, INC. | WIRELESS PROV | More |
331 | 998 | DOWNERSGRV | Illinois | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | WIRELESS PROV | More |
331 | 999 | OSWEGO | Illinois | BANDWIDTH.COM CLEC, LLC - IL | | More |
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