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 |
| 312-371
| 5 |
|
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-371
| 6 |
|
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-371
| 7 |
|
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-371
| 8 |
|
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-371
| 9 |
|
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-373
| A |
CHCGILGMDS7 |
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
|
|
| 312-373
| 0 |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2010-03-04 |
|
| 312-373
| 1 |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
|
|
| 312-373
| 2 |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
|
|
| 312-373
| 3 |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
|
|
| 312-373
| 4 |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
|
|
| 312-373
| 5 |
|
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
|
|
| 312-373
| 6 |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
|
|
| 312-373
| 7 |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
|
|
| 312-373
| 8 |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
|
|
| 312-373
| 9 |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
|
|
| 312-376
| A |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
|
|
| 312-376
| 0 |
|
224C ONVOY, LLC |
358 |
|
2004-08-01 |
|
| 312-376
| 1 |
|
224C ONVOY, LLC |
358 |
|
2004-08-01 |
|
| 312-376
| 2 |
|
224C ONVOY, LLC |
358 |
|
2004-08-01 |
|
| 312-376
| 3 |
|
224C ONVOY, LLC |
358 |
|
2004-08-01 |
|
| 312-376
| 4 |
|
224C ONVOY, LLC |
358 |
|
2004-08-01 |
|
| 312-376
| 5 |
|
5562 METROPCS, INC. |
358 |
|
2004-09-06 |
|
| 312-376
| 6 |
|
5562 METROPCS, INC. |
358 |
|
2004-09-06 |
|
| 312-376
| 7 |
|
5562 METROPCS, INC. |
358 |
|
2004-09-06 |
|
| 312-376
| 8 |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2004-09-02 |
|
| 312-376
| 9 |
|
5562 METROPCS, INC. |
358 |
|
2004-09-06 |
|
| 312-377
| A |
BNSVILDGDS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
358 |
|
|
|
| 312-378
| A |
LBRDILGOAMD |
6630 USA MOBILITY WIRELESS, INC. |
358 |
|
|
|
| 312-379
| A |
CHCGILWBXWZ |
829J PAETEC ITEL, LLC |
358 |
|
2024-12-09 |
|
| 312-379
| 0 |
|
829J PAETEC ITEL, LLC |
358 |
|
|
|
| 312-379
| 1 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
2002-06-03 |
|
| 312-379
| 2 |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
358 |
|
|
|
| 312-379
| 3 |
|
460K FIRST COMMUNICATIONS, LLC |
358 |
|
2005-02-24 |
|
| 312-379
| 4 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
2000-05-05 |
|
| 312-379
| 5 |
|
829J PAETEC ITEL, LLC |
358 |
|
|
|
| 312-379
| 6 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
2000-05-05 |
|
| 312-379
| 7 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
2000-05-05 |
|
| 312-379
| 8 |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2006-12-09 |
|
| 312-379
| 9 |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2010-02-25 |
|
| 312-383
| A |
CHCGILCGDS1 |
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
|
|
| 312-383
| 0 |
|
5562 METROPCS, INC. |
358 |
|
2016-03-09 |
|
| 312-383
| 1 |
|
5562 METROPCS, INC. |
358 |
|
2016-03-09 |
|
| 312-383
| 2 |
|
5562 METROPCS, INC. |
358 |
|
2016-03-09 |
|
| 312-383
| 3 |
|
5562 METROPCS, INC. |
358 |
|
2016-03-09 |
|
| 312-383
| 4 |
|
5562 METROPCS, INC. |
358 |
|
2016-03-09 |
|
| 312-383
| 5 |
|
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
2016-03-02 |
|
| 312-383
| 6 |
|
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
2016-03-02 |
|
| 312-383
| 7 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2016-04-09 |
|
| 312-383
| 8 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2016-04-09 |
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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