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 |
| 312-874
| 4 |
|
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
2015-07-22 |
|
| 312-874
| 5 |
|
224C ONVOY, LLC |
358 |
|
2015-07-28 |
|
| 312-874
| 6 |
|
224C ONVOY, LLC |
358 |
|
2015-07-28 |
|
| 312-874
| 7 |
|
224C ONVOY, LLC |
358 |
|
2015-07-28 |
|
| 312-874
| 8 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2015-07-20 |
|
| 312-874
| 9 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2015-07-20 |
|
| 312-877
| A |
CHCGILCLXOX |
516C AT&T CORP. |
358 |
|
|
|
| 312-877
| 0 |
|
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
2014-09-13 |
|
| 312-877
| 1 |
|
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
2014-09-13 |
|
| 312-877
| 2 |
|
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
2014-09-13 |
|
| 312-877
| 3 |
|
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
2014-09-13 |
|
| 312-877
| 4 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2014-09-19 |
|
| 312-877
| 5 |
|
516C AT&T CORP. |
358 |
|
2014-09-11 |
|
| 312-877
| 6 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2014-09-19 |
|
| 312-877
| 7 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2014-09-19 |
|
| 312-877
| 8 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2014-09-19 |
|
| 312-877
| 9 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2014-09-19 |
|
| 312-878
| A |
CHCGILWUDS4 |
063E PEERLESS NETWORK OF ILLINOIS, LLC - IL |
358 |
|
|
|
| 312-878
| 0 |
|
063E PEERLESS NETWORK OF ILLINOIS, LLC - IL |
358 |
|
2008-05-10 |
|
| 312-878
| 1 |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2008-06-09 |
|
| 312-878
| 2 |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2008-06-12 |
|
| 312-878
| 3 |
|
063E PEERLESS NETWORK OF ILLINOIS, LLC - IL |
358 |
|
2008-03-27 |
|
| 312-878
| 4 |
|
063E PEERLESS NETWORK OF ILLINOIS, LLC - IL |
358 |
|
2008-03-27 |
|
| 312-878
| 5 |
|
063E PEERLESS NETWORK OF ILLINOIS, LLC - IL |
358 |
|
2008-03-27 |
|
| 312-878
| 6 |
|
063E PEERLESS NETWORK OF ILLINOIS, LLC - IL |
358 |
|
2008-03-27 |
|
| 312-878
| 7 |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2008-06-12 |
|
| 312-878
| 8 |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2008-06-12 |
|
| 312-878
| 9 |
|
063E PEERLESS NETWORK OF ILLINOIS, LLC - IL |
358 |
|
2008-05-10 |
|
| 312-881
| A |
CHCGILWBXWZ |
829J PAETEC ITEL, LLC |
358 |
|
2024-12-09 |
|
| 312-881
| 0 |
|
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
2016-12-16 |
|
| 312-881
| 1 |
|
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
2001-08-16 |
|
| 312-881
| 2 |
|
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
2000-05-19 |
|
| 312-881
| 3 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
2002-06-04 |
|
| 312-881
| 4 |
|
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
2000-05-19 |
|
| 312-881
| 5 |
|
829J PAETEC ITEL, LLC |
358 |
|
|
|
| 312-881
| 6 |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2001-12-26 |
|
| 312-881
| 7 |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2000-07-20 |
|
| 312-881
| 8 |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2000-07-20 |
|
| 312-881
| 9 |
|
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
2011-08-07 |
|
| 312-883
| A |
CHCGILWBXDZ |
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
|
|
| 312-883
| 0 |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2015-01-11 |
|
| 312-883
| 1 |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2015-01-11 |
|
| 312-883
| 2 |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2015-01-11 |
|
| 312-883
| 3 |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2015-01-11 |
|
| 312-883
| 4 |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2015-01-11 |
|
| 312-883
| 5 |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2015-01-11 |
|
| 312-883
| 6 |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2015-01-11 |
|
| 312-883
| 7 |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2015-01-11 |
|
| 312-883
| 8 |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2015-01-11 |
|
| 312-883
| 9 |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2015-01-11 |
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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