Local Calling Guide
Area code/prefix search
NPA: 331
[Rate centres in NPA 331]
[Dial plan for NPA 331]
<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 >>
| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 331-345
| 7 |
Naperville |
IL |
CHCGILWUKMD |
939H COMMIO, LLC |
358 |
|
2021-10-14 |
|
| 331-345
| 8 |
Naperville |
IL |
CHCGILWUKMD |
939H COMMIO, LLC |
358 |
|
2021-10-14 |
|
| 331-345
| 9 |
Naperville |
IL |
RVDLILBDAMD |
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
2022-01-10 |
|
| 331-348
| A |
Elburn |
IL |
CHCGILWURMD |
965H FRACTEL, LLC |
358 |
|
|
|
| 331-348
| 0 |
Elburn |
IL |
CHCGIL24XMD |
495J STRATUS NETWORKS |
358 |
|
2020-10-02 |
|
| 331-348
| 1 |
Elburn |
IL |
CHCGILWUDS4 |
063E PEERLESS NETWORK OF ILLINOIS, LLC - IL |
358 |
|
2020-11-09 |
|
| 331-348
| 2 |
Elburn |
IL |
CHCGILIDXDX |
624H ONVOY SPECTRUM, LLC |
358 |
|
2021-11-26 |
|
| 331-348
| 4 |
Elburn |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2021-08-09 |
|
| 331-348
| 5 |
Elburn |
IL |
CHCGILIDXDX |
624H ONVOY SPECTRUM, LLC |
358 |
|
2021-06-28 |
|
| 331-348
| 6 |
Elburn |
IL |
CHCGILWURMD |
965H FRACTEL, LLC |
358 |
|
2019-12-12 |
|
| 331-348
| 7 |
Elburn |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2021-08-09 |
|
| 331-348
| 8 |
Elburn |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2020-07-17 |
|
| 331-348
| 9 |
Elburn |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2020-07-17 |
|
| 331-356
| A |
Bartlett |
IL |
CHCGILWURMD |
965H FRACTEL, LLC |
358 |
|
|
|
| 331-356
| 0 |
Bartlett |
IL |
CHCGIL24MMD |
515J IP HORIZON LLC |
358 |
|
2021-06-13 |
|
| 331-356
| 1 |
Bartlett |
IL |
CHCGILWUIMD |
197D VONAGE AMERICA LLC |
358 |
|
2020-10-15 |
|
| 331-356
| 2 |
Bartlett |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2021-07-24 |
|
| 331-356
| 3 |
Bartlett |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2021-07-24 |
|
| 331-356
| 4 |
Bartlett |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2021-07-24 |
|
| 331-356
| 5 |
Bartlett |
IL |
CHCGILWUIMD |
197D VONAGE AMERICA LLC |
358 |
|
2020-10-15 |
|
| 331-356
| 6 |
Bartlett |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2021-07-24 |
|
| 331-356
| 7 |
Bartlett |
IL |
CHCGILWURMD |
965H FRACTEL, LLC |
358 |
|
2019-12-10 |
|
| 331-356
| 8 |
Bartlett |
IL |
CHCGILWURMD |
965H FRACTEL, LLC |
358 |
|
2019-12-10 |
|
| 331-356
| 9 |
Bartlett |
IL |
CHCGILWURMD |
965H FRACTEL, LLC |
358 |
|
2020-08-07 |
|
| 331-373
| A |
Oswego |
IL |
CHCGILWUTMD |
516J TON80 COMMUNICATIONS, LLC |
358 |
|
|
|
| 331-373
| 0 |
Oswego |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2024-03-01 |
|
| 331-373
| 1 |
Oswego |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2024-03-01 |
|
| 331-373
| 2 |
Oswego |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2024-03-01 |
|
| 331-373
| 3 |
Oswego |
IL |
CHCGILWUTMD |
516J TON80 COMMUNICATIONS, LLC |
358 |
|
2022-04-29 |
|
| 331-373
| 4 |
Oswego |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2024-04-05 |
|
| 331-373
| 5 |
Oswego |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2023-08-12 |
|
| 331-373
| 6 |
Oswego |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2023-08-12 |
|
| 331-373
| 7 |
Oswego |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2023-08-12 |
|
| 331-373
| 8 |
Oswego |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2023-08-12 |
|
| 331-373
| 9 |
Oswego |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2023-08-12 |
|
| 331-385
| A |
Aurora |
IL |
WCHCILBFGT0 |
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
|
|
| 331-385
| 0 |
Aurora |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2017-01-06 |
|
| 331-385
| 1 |
Aurora |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2017-01-06 |
|
| 331-385
| 2 |
Aurora |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2017-01-06 |
|
| 331-385
| 3 |
Aurora |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2017-01-06 |
|
| 331-385
| 4 |
Aurora |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2017-01-06 |
|
| 331-385
| 5 |
Aurora |
IL |
WCHCILBFGT0 |
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
2016-12-24 |
|
| 331-385
| 6 |
Aurora |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2017-03-01 |
|
| 331-385
| 7 |
Aurora |
IL |
RVDLILBDAMD |
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
2017-03-24 |
|
| 331-385
| 8 |
Aurora |
IL |
RVDLILBDAMD |
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
2017-03-24 |
|
| 331-385
| 9 |
Aurora |
IL |
WCHCILBFGT0 |
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
2016-11-12 |
|
| 331-388
| A |
Sugar Grove |
IL |
CHCGILWURMD |
965H FRACTEL, LLC |
358 |
|
|
|
| 331-388
| 0 |
Sugar Grove |
IL |
CHCGILCNHMD |
073H TELNYX LLC |
358 |
|
2022-12-05 |
|
| 331-388
| 1 |
Sugar Grove |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2023-02-11 |
|
| 331-388
| 2 |
Sugar Grove |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2023-02-11 |
|
| 331-388
| 3 |
Sugar Grove |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2023-07-03 |
|
| 331-388
| 4 |
Sugar Grove |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2024-03-14 |
|
| 331-388
| 5 |
Sugar Grove |
IL |
|
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
2025-08-28 |
|
| 331-388
| 7 |
Sugar Grove |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2022-02-27 |
|
| 331-388
| 8 |
Sugar Grove |
IL |
|
965H FRACTEL, LLC |
358 |
|
2021-03-26 |
|
| 331-388
| 9 |
Sugar Grove |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2023-09-07 |
|
| 331-399
| A |
Downers Grove |
IL |
CHCGILWURMD |
965H FRACTEL, LLC |
358 |
|
|
|
| 331-399
| 0 |
Downers Grove |
IL |
CHCGIL24MMD |
515J IP HORIZON LLC |
358 |
|
2021-06-12 |
|
| 331-399
| 1 |
Downers Grove |
IL |
RVDLILBDAMD |
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
2021-09-29 |
|
| 331-399
| 2 |
Downers Grove |
IL |
RVDLILBDAMD |
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
2021-09-29 |
|
| 331-399
| 3 |
Downers Grove |
IL |
RVDLILBDAMD |
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
2024-11-22 |
|
| 331-399
| 4 |
Downers Grove |
IL |
CHCGILIDXDX |
624H ONVOY SPECTRUM, LLC |
358 |
|
2021-06-28 |
|
| 331-399
| 5 |
Downers Grove |
IL |
RVDLILBDAMD |
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
2021-09-29 |
|
| 331-399
| 6 |
Downers Grove |
IL |
OKBRILOAXEX |
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
2021-03-27 |
|
| 331-399
| 7 |
Downers Grove |
IL |
CHCGILIDXDX |
624H ONVOY SPECTRUM, LLC |
358 |
|
2021-11-14 |
|
| 331-399
| 8 |
Downers Grove |
IL |
CHCGILIDXDX |
624H ONVOY SPECTRUM, LLC |
358 |
|
2021-11-14 |
|
| 331-399
| 9 |
Downers Grove |
IL |
CHCGILWURMD |
965H FRACTEL, LLC |
358 |
|
2021-03-26 |
|
| 331-400
| A |
Oswego |
IL |
CHCGILWURMD |
965H FRACTEL, LLC |
358 |
|
|
|
| 331-400
| 0 |
Oswego |
IL |
|
965H FRACTEL, LLC |
358 |
|
2019-10-02 |
|
| 331-400
| 1 |
Oswego |
IL |
CHCGILWUDS4 |
063E PEERLESS NETWORK OF ILLINOIS, LLC - IL |
358 |
|
2019-10-03 |
|
| 331-400
| 2 |
Oswego |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2021-08-12 |
|
| 331-400
| 3 |
Oswego |
IL |
BURGILAHGT3 |
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
2024-11-22 |
|
| 331-400
| 4 |
Oswego |
IL |
|
965H FRACTEL, LLC |
358 |
|
2019-10-02 |
|
| 331-400
| 5 |
Oswego |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2024-04-05 |
|
| 331-400
| 6 |
Oswego |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2021-08-12 |
|
| 331-400
| 7 |
Oswego |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2021-08-12 |
|
| 331-400
| 8 |
Oswego |
IL |
CHCGIL24XMD |
495J STRATUS NETWORKS |
358 |
|
2020-09-26 |
|
| 331-400
| 9 |
Oswego |
IL |
|
515J IP HORIZON LLC |
358 |
|
2021-06-26 |
|
| 331-401
| A |
Naperville |
IL |
CHCGILGMDS7 |
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
|
|
| 331-401
| 0 |
Naperville |
IL |
RVDLILBDAMD |
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
2017-08-15 |
|
| 331-401
| 1 |
Naperville |
IL |
CHCGILGMDS7 |
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2016-02-04 |
|
| 331-401
| 2 |
Naperville |
IL |
RVDLILBDAMD |
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
2017-01-22 |
|
| 331-401
| 3 |
Naperville |
IL |
RVDLILBDAMD |
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
2016-02-22 |
|
| 331-401
| 4 |
Naperville |
IL |
BFGVILASG00 |
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
2016-06-13 |
|
| 331-401
| 5 |
Naperville |
IL |
CHCGILNEXJX |
318J COMCAST IP PHONE, LLC |
358 |
|
2016-02-05 |
|
| 331-401
| 6 |
Naperville |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2017-02-13 |
|
| 331-401
| 7 |
Naperville |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2017-04-13 |
|
| 331-401
| 8 |
Naperville |
IL |
BFGVILASG00 |
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
2016-09-14 |
|
| 331-401
| 9 |
Naperville |
IL |
BFGVILASG00 |
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
2016-09-14 |
|
| 331-422
| A |
Geneva |
IL |
CHCGILGMDS7 |
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
|
|
| 331-422
| 0 |
Geneva |
IL |
CHCGILGMDS7 |
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2009-01-10 |
|
| 331-422
| 1 |
Geneva |
IL |
|
515J IP HORIZON LLC |
358 |
|
2013-05-05 |
|
| 331-422
| 3 |
Geneva |
IL |
CHCGILGMDS7 |
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2012-08-27 |
|
| 331-422
| 4 |
Geneva |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2014-04-17 |
|
| 331-422
| 5 |
Geneva |
IL |
WCHCILBFGT0 |
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
2014-07-22 |
|
| 331-422
| 6 |
Geneva |
IL |
RVDLILBDAMD |
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
2014-10-12 |
|
| 331-422
| 7 |
Geneva |
IL |
CHCGILGMDS7 |
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2012-02-27 |
|
| 331-422
| 8 |
Geneva |
IL |
WCHCILBFGT0 |
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
2012-09-26 |
|
| 331-422
| 9 |
Geneva |
IL |
BFGVILASG00 |
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
2009-12-28 |
|
| 331-425
| A |
Aurora |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
|
|
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Last updated: Thu, 16 Oct 2025 03:04:18 UTC
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