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NPA: 331 [Rate centres in NPA 331] [Dial plan for NPA 331]

Block: A

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
331-200 A Bartlett IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
331-201 A Downers Grove IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
331-202 A Elmhurst IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
331-203 A Aurora IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
331-204 A Naperville IL CHCGIL24DS6  224C ONVOY, LLC 358      
331-205 A Aurora IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
331-206 A Aurora IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
331-207 A Yorkville IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
331-208 A Aurora IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
331-209 A Elmhurst IL CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
331-210 A Geneva IL CHCGILWUDS4  063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358      
331-212 A Aurora IL EGVGILIFDS1  7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358      
331-213 A Naperville IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
331-214 A Downers Grove IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
331-215 A Naperville IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
331-216 A Oswego IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
331-217 A Lombard IL CHCGIL24DS6  224C ONVOY, LLC 358      
331-218 A Wheaton IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
331-219 A Aurora IL CHCGIL245MD  073H TELNYX LLC 358      
331-220 A Aurora IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
331-221 A Elmhurst IL EMHRILETDS0  9329 ILLINOIS BELL TEL CO 358      
331-222 A Geneva IL WCHCILBFGT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
331-223 A Geneva IL WCHCILBFGT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
331-224 A Bensenville IL CHCGIL24DS6  224C ONVOY, LLC 358      
331-225 A Elmhurst IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
331-226 A Naperville IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
331-227 A Sugar Grove IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
331-228 A Geneva IL CHCGILWBXWZ  829J PAETEC ITEL, LLC 358   2024-12-09   
331-229 A Naperville IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
331-230 A Aurora IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
331-231 A Naperville IL SCBGILRRGT1  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
331-232 A West Chicago IL SCBGILRRGT1  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
331-233 A Downers Grove IL CHCGILCNHMD  073H TELNYX LLC 358      
331-234 A Sugar Grove IL RVDLILBDAMD  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
331-235 A Geneva IL WCHCILBFGT0  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
331-236 A Wheaton IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
331-237 A Naperville IL EGVGILIFDS1  7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358      
331-238 A Downers Grove IL OKBRILOAXEX  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
331-239 A Yorkville IL CHCGIL24DS6  224C ONVOY, LLC 358      
331-240 A West Chicago IL CHCGILWUDS4  063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358      
331-241 A Lombard IL CHCGIL24DS6  224C ONVOY, LLC 358      
331-242 A Lombard IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
331-243 A Lombard IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
331-244 A Naperville IL CHCGIL24DS6  224C ONVOY, LLC 358      
331-245 A Bartlett IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
331-246 A Lemont IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
331-247 A Naperville IL CHCGILWUIMD  197D VONAGE AMERICA LLC 358      
331-248 A Geneva IL CHCGILNEXJX  318J COMCAST IP PHONE, LLC 358      
331-249 A Naperville IL CHCGIL24DS6  224C ONVOY, LLC 358      
331-250 A Aurora IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      

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Last updated: Sat, 01 Aug 2026 03:19:33 UTC

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