Local Calling Guide
Area code/prefix search
Chicago Zone 01-Calumet, IL
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| NPA-NXX |
BLOCK |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 312-528
| 7 |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
358 |
|
2011-01-05 |
|
| 312-528
| 8 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-528
| 9 |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2000-08-29 |
|
| 312-530
| A |
CHCGIL24XMD |
495J STRATUS NETWORKS |
358 |
|
|
|
| 312-530
| 0 |
|
073H TELNYX LLC |
358 |
|
2020-11-08 |
|
| 312-530
| 1 |
|
495J STRATUS NETWORKS |
358 |
|
2020-09-20 |
|
| 312-530
| 2 |
|
5562 METROPCS, INC. |
358 |
|
2020-09-21 |
|
| 312-530
| 3 |
|
5562 METROPCS, INC. |
358 |
|
2020-09-21 |
|
| 312-530
| 4 |
|
5562 METROPCS, INC. |
358 |
|
2020-09-21 |
|
| 312-530
| 5 |
|
5562 METROPCS, INC. |
358 |
|
2020-09-21 |
|
| 312-530
| 6 |
|
5562 METROPCS, INC. |
358 |
|
2020-09-21 |
|
| 312-530
| 7 |
|
224C ONVOY, LLC |
358 |
|
2020-11-09 |
|
| 312-530
| 8 |
|
224C ONVOY, LLC |
358 |
|
2020-11-09 |
|
| 312-530
| 9 |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2020-10-31 |
|
| 312-532
| A |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-532
| 0 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2008-08-09 |
|
| 312-532
| 1 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2008-08-09 |
|
| 312-532
| 2 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2008-08-09 |
|
| 312-532
| 3 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2008-08-29 |
|
| 312-532
| 4 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2008-03-14 |
|
| 312-532
| 5 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2008-08-29 |
|
| 312-532
| 6 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2008-08-29 |
|
| 312-532
| 7 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2008-08-29 |
|
| 312-532
| 8 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2008-08-29 |
|
| 312-532
| 9 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2008-03-14 |
|
| 312-534
| A |
CHCGILSUDS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-534
| 0 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
2008-11-01 |
|
| 312-534
| 1 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
2008-11-01 |
|
| 312-534
| 2 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
2008-11-01 |
|
| 312-534
| 3 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
2008-11-01 |
|
| 312-534
| 4 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
2008-11-01 |
|
| 312-534
| 5 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
2008-11-01 |
|
| 312-534
| 6 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
2008-11-01 |
|
| 312-534
| 7 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
2008-11-01 |
|
| 312-534
| 8 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
2008-11-01 |
|
| 312-534
| 9 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
2008-11-01 |
|
| 312-535
| A |
CHCGILWBXDZ |
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
|
|
| 312-535
| 0 |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2017-09-22 |
|
| 312-535
| 1 |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2017-09-22 |
|
| 312-535
| 2 |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2017-09-22 |
|
| 312-535
| 3 |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2017-09-22 |
|
| 312-535
| 4 |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2017-09-22 |
|
| 312-535
| 5 |
|
224C ONVOY, LLC |
358 |
|
2017-09-23 |
|
| 312-535
| 6 |
|
224C ONVOY, LLC |
358 |
|
2017-09-23 |
|
| 312-535
| 7 |
|
224C ONVOY, LLC |
358 |
|
2017-09-23 |
|
| 312-535
| 8 |
|
224C ONVOY, LLC |
358 |
|
2017-09-23 |
|
| 312-535
| 9 |
|
224C ONVOY, LLC |
358 |
|
2017-09-23 |
|
| 312-536
| A |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-536
| 0 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2015-08-10 |
|
| 312-536
| 1 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2015-08-10 |
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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