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 |
| 312-468
| A |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-468
| 0 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2015-08-28 |
|
| 312-468
| 1 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2015-08-28 |
|
| 312-468
| 2 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2015-08-28 |
|
| 312-468
| 3 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2015-08-28 |
|
| 312-468
| 4 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2015-08-28 |
|
| 312-468
| 5 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2015-08-28 |
|
| 312-468
| 6 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2015-08-28 |
|
| 312-468
| 7 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2015-08-28 |
|
| 312-468
| 8 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2015-08-28 |
|
| 312-468
| 9 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2015-08-28 |
|
| 312-471
| A |
BNSVILDGDS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
358 |
|
|
|
| 312-471
| 0 |
|
063E PEERLESS NETWORK OF ILLINOIS, LLC - IL |
358 |
|
2015-08-12 |
|
| 312-471
| 1 |
|
063E PEERLESS NETWORK OF ILLINOIS, LLC - IL |
358 |
|
2015-08-12 |
|
| 312-471
| 2 |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2015-08-22 |
|
| 312-471
| 3 |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
358 |
|
2015-08-10 |
|
| 312-471
| 4 |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
358 |
|
2015-08-10 |
|
| 312-471
| 5 |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
358 |
|
2015-08-10 |
|
| 312-471
| 6 |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2015-08-22 |
|
| 312-471
| 7 |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2015-08-22 |
|
| 312-471
| 8 |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2015-08-22 |
|
| 312-471
| 9 |
|
063E PEERLESS NETWORK OF ILLINOIS, LLC - IL |
358 |
|
2015-08-12 |
|
| 312-473
| A |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2024-12-29 |
|
| 312-473
| 0 |
|
224C ONVOY, LLC |
358 |
|
2007-01-06 |
|
| 312-473
| 1 |
|
224C ONVOY, LLC |
358 |
|
2007-01-06 |
|
| 312-473
| 2 |
|
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
2025-09-25 |
|
| 312-473
| 3 |
|
224C ONVOY, LLC |
358 |
|
2007-01-06 |
|
| 312-473
| 4 |
|
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
2025-09-25 |
|
| 312-473
| 5 |
|
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
2025-09-25 |
|
| 312-473
| 6 |
|
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
2025-09-25 |
|
| 312-473
| 7 |
|
224C ONVOY, LLC |
358 |
|
2025-09-27 |
|
| 312-473
| 8 |
|
224C ONVOY, LLC |
358 |
|
2025-04-06 |
|
| 312-473
| 9 |
|
321J HD CARRIER LLC |
358 |
|
2025-10-11 |
|
| 312-476
| A |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-476
| 0 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2004-03-01 |
|
| 312-476
| 1 |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2000-08-29 |
|
| 312-476
| 2 |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2000-08-29 |
|
| 312-476
| 3 |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2002-05-01 |
|
| 312-476
| 4 |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2002-05-01 |
|
| 312-476
| 5 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
2002-06-04 |
|
| 312-476
| 6 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
2002-06-04 |
|
| 312-476
| 7 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
2002-06-04 |
|
| 312-476
| 8 |
|
460K FIRST COMMUNICATIONS, LLC |
358 |
|
2009-09-16 |
|
| 312-476
| 9 |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2010-03-04 |
|
| 312-477
| A |
CHCGILGMDS7 |
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
|
|
| 312-477
| 0 |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2011-04-13 |
|
| 312-477
| 1 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2013-06-22 |
|
| 312-477
| 2 |
|
224C ONVOY, LLC |
358 |
|
2011-02-10 |
|
| 312-477
| 3 |
|
224C ONVOY, LLC |
358 |
|
2011-02-10 |
|
| 312-477
| 4 |
|
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
2011-02-14 |
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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