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 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 >>
| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 331-316
| 6 |
Naperville |
IL |
|
224C ONVOY, LLC |
358 |
|
2024-03-11 |
|
| 331-316
| 7 |
Naperville |
IL |
|
224C ONVOY, LLC |
358 |
|
2024-03-11 |
|
| 331-316
| 8 |
Naperville |
IL |
|
224C ONVOY, LLC |
358 |
|
2024-03-11 |
|
| 331-316
| 9 |
Naperville |
IL |
|
224C ONVOY, LLC |
358 |
|
2024-03-11 |
|
| 331-317
| A |
Hinsdale |
IL |
CHCGILWUKMD |
939H COMMIO, LLC |
358 |
|
2024-03-10 |
|
| 331-317
| 0 |
Hinsdale |
IL |
|
939H COMMIO, LLC |
358 |
|
2024-03-10 |
|
| 331-317
| 1 |
Hinsdale |
IL |
|
939H COMMIO, LLC |
358 |
|
2024-03-10 |
|
| 331-317
| 2 |
Hinsdale |
IL |
|
939H COMMIO, LLC |
358 |
|
2024-03-10 |
|
| 331-317
| 3 |
Hinsdale |
IL |
|
939H COMMIO, LLC |
358 |
|
2024-03-10 |
|
| 331-317
| 4 |
Hinsdale |
IL |
|
224C ONVOY, LLC |
358 |
|
2024-05-11 |
|
| 331-317
| 5 |
Hinsdale |
IL |
|
478J NUSO, LLC |
358 |
|
2024-06-04 |
|
| 331-317
| 6 |
Hinsdale |
IL |
|
478J NUSO, LLC |
358 |
|
2024-06-04 |
|
| 331-317
| 7 |
Hinsdale |
IL |
|
224C ONVOY, LLC |
358 |
|
2024-03-12 |
|
| 331-317
| 8 |
Hinsdale |
IL |
|
224C ONVOY, LLC |
358 |
|
2024-03-12 |
|
| 331-317
| 9 |
Hinsdale |
IL |
|
224C ONVOY, LLC |
358 |
|
2024-03-12 |
|
| 331-318
| A |
Lemont |
IL |
CHCGILWBXDZ |
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
|
|
| 331-318
| 0 |
Lemont |
IL |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2014-02-16 |
|
| 331-318
| 1 |
Lemont |
IL |
|
515J IP HORIZON LLC |
358 |
|
2013-09-30 |
|
| 331-318
| 2 |
Lemont |
IL |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2014-02-16 |
|
| 331-318
| 3 |
Lemont |
IL |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2014-02-08 |
|
| 331-318
| 4 |
Lemont |
IL |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2014-02-16 |
|
| 331-318
| 5 |
Lemont |
IL |
|
460K FIRST COMMUNICATIONS, LLC |
358 |
|
2014-03-22 |
|
| 331-318
| 6 |
Lemont |
IL |
|
138G LEVEL 3 TELECOM OF ILLINOIS, LLC - IL |
358 |
|
2014-02-27 |
|
| 331-318
| 7 |
Lemont |
IL |
|
318J COMCAST IP PHONE, LLC |
358 |
|
2014-07-28 |
|
| 331-318
| 8 |
Lemont |
IL |
|
318J COMCAST IP PHONE, LLC |
358 |
|
2014-08-14 |
|
| 331-318
| 9 |
Lemont |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2014-11-21 |
|
| 331-319
| A |
Aurora |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2024-03-29 |
|
| 331-319
| 0 |
Aurora |
IL |
|
224C ONVOY, LLC |
358 |
|
2024-03-29 |
|
| 331-319
| 1 |
Aurora |
IL |
|
224C ONVOY, LLC |
358 |
|
2024-03-29 |
|
| 331-319
| 2 |
Aurora |
IL |
|
224C ONVOY, LLC |
358 |
|
2024-03-29 |
|
| 331-319
| 3 |
Aurora |
IL |
|
224C ONVOY, LLC |
358 |
|
2024-03-29 |
|
| 331-319
| 4 |
Aurora |
IL |
|
224C ONVOY, LLC |
358 |
|
2024-03-29 |
|
| 331-319
| 5 |
Aurora |
IL |
|
732J NUSO, LLC |
358 |
|
2024-06-14 |
|
| 331-319
| 6 |
Aurora |
IL |
|
732J NUSO, LLC |
358 |
|
2024-06-14 |
|
| 331-319
| 7 |
Aurora |
IL |
|
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
2024-11-22 |
|
| 331-319
| 8 |
Aurora |
IL |
|
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
2024-11-22 |
|
| 331-319
| 9 |
Aurora |
IL |
|
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
2024-12-19 |
|
| 331-320
| A |
Bartlett |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2024-04-04 |
|
| 331-320
| 0 |
Bartlett |
IL |
|
224C ONVOY, LLC |
358 |
|
2024-04-04 |
|
| 331-320
| 1 |
Bartlett |
IL |
|
224C ONVOY, LLC |
358 |
|
2024-04-04 |
|
| 331-320
| 2 |
Bartlett |
IL |
|
224C ONVOY, LLC |
358 |
|
2024-04-04 |
|
| 331-320
| 3 |
Bartlett |
IL |
|
224C ONVOY, LLC |
358 |
|
2024-04-04 |
|
| 331-320
| 4 |
Bartlett |
IL |
|
224C ONVOY, LLC |
358 |
|
2024-04-04 |
|
| 331-320
| 5 |
Bartlett |
IL |
|
224C ONVOY, LLC |
358 |
|
2024-04-04 |
|
| 331-320
| 6 |
Bartlett |
IL |
|
224C ONVOY, LLC |
358 |
|
2024-04-04 |
|
| 331-320
| 7 |
Bartlett |
IL |
|
490J DISH WIRELESS, LLC |
358 |
|
2025-11-20 |
|
| 331-320
| 8 |
Bartlett |
IL |
|
224C ONVOY, LLC |
358 |
|
2024-05-24 |
|
| 331-320
| 9 |
Bartlett |
IL |
|
490J DISH WIRELESS, LLC |
358 |
|
2026-01-19 |
|
| 331-321
| A |
Aurora |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 331-321
| 0 |
Aurora |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2017-05-22 |
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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