Local Calling Guide
Area code/prefix search
NPA: 312
[Rate centres in NPA 312]
[Dial plan for NPA 312]
<< 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 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 >>
| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 312-724
| 9 |
Chicago Zone 01-Calumet |
IL |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2013-04-08 |
|
| 312-725
| A |
Chicago Zone 01-Calumet |
IL |
CHCGILWBXDZ |
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
|
|
| 312-725
| 0 |
Chicago Zone 01-Calumet |
IL |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2008-12-15 |
|
| 312-725
| 1 |
Chicago Zone 01-Calumet |
IL |
|
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
2009-08-24 |
|
| 312-725
| 2 |
Chicago Zone 01-Calumet |
IL |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2009-09-06 |
|
| 312-725
| 3 |
Chicago Zone 01-Calumet |
IL |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2009-09-06 |
|
| 312-725
| 4 |
Chicago Zone 01-Calumet |
IL |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2009-09-06 |
|
| 312-725
| 5 |
Chicago Zone 01-Calumet |
IL |
|
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
2009-08-24 |
|
| 312-725
| 6 |
Chicago Zone 01-Calumet |
IL |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2009-09-06 |
|
| 312-725
| 7 |
Chicago Zone 01-Calumet |
IL |
|
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
2009-08-24 |
|
| 312-725
| 8 |
Chicago Zone 01-Calumet |
IL |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2009-09-06 |
|
| 312-725
| 9 |
Chicago Zone 01-Calumet |
IL |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2009-09-06 |
|
| 312-726
| A |
Chicago Zone 01-Franklin |
IL |
CHCGILFRDS3 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-727
| A |
Chicago Zone 01-Franklin |
IL |
CHCGILFRDS2 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-728
| A |
Chicago Zone 01-Calumet |
IL |
RVDLILBDAMD |
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
|
|
| 312-728
| 0 |
Chicago Zone 01-Calumet |
IL |
|
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
2017-12-18 |
|
| 312-728
| 1 |
Chicago Zone 01-Calumet |
IL |
|
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
2018-04-02 |
|
| 312-728
| 2 |
Chicago Zone 01-Calumet |
IL |
|
224C ONVOY, LLC |
358 |
|
2018-07-12 |
|
| 312-728
| 3 |
Chicago Zone 01-Calumet |
IL |
|
224C ONVOY, LLC |
358 |
|
2018-07-12 |
|
| 312-728
| 4 |
Chicago Zone 01-Calumet |
IL |
|
224C ONVOY, LLC |
358 |
|
2018-07-12 |
|
| 312-728
| 5 |
Chicago Zone 01-Calumet |
IL |
|
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
2018-04-19 |
|
| 312-728
| 6 |
Chicago Zone 01-Calumet |
IL |
|
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
2018-04-19 |
|
| 312-728
| 7 |
Chicago Zone 01-Calumet |
IL |
|
224C ONVOY, LLC |
358 |
|
2018-07-12 |
|
| 312-728
| 8 |
Chicago Zone 01-Calumet |
IL |
|
224C ONVOY, LLC |
358 |
|
2018-07-12 |
|
| 312-728
| 9 |
Chicago Zone 01-Calumet |
IL |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2018-07-08 |
|
| 312-729
| A |
Chicago Zone 01-Lakeshore |
IL |
CHCGILLRDS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-730
| A |
Chicago Zone 01-Wabash |
IL |
CHCGILCLDS9 |
7421 AT&T - LOCAL |
358 |
|
|
|
| 312-730
| 0 |
Chicago Zone 01-Wabash |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2007-07-27 |
|
| 312-730
| 1 |
Chicago Zone 01-Wabash |
IL |
|
7421 AT&T - LOCAL |
358 |
|
|
|
| 312-730
| 2 |
Chicago Zone 01-Wabash |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2007-07-27 |
|
| 312-730
| 3 |
Chicago Zone 01-Wabash |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2004-08-23 |
|
| 312-730
| 4 |
Chicago Zone 01-Wabash |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2004-08-23 |
|
| 312-730
| 5 |
Chicago Zone 01-Wabash |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2004-08-23 |
|
| 312-730
| 6 |
Chicago Zone 01-Wabash |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2004-08-23 |
|
| 312-730
| 7 |
Chicago Zone 01-Wabash |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2004-08-23 |
|
| 312-730
| 8 |
Chicago Zone 01-Wabash |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2005-03-19 |
|
| 312-730
| 9 |
Chicago Zone 01-Wabash |
IL |
|
7421 AT&T - LOCAL |
358 |
|
|
|
| 312-731
| A |
Chicago Zone 01-Calumet |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-731
| 0 |
Chicago Zone 01-Calumet |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2005-08-01 |
|
| 312-731
| 1 |
Chicago Zone 01-Calumet |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2004-02-09 |
|
| 312-731
| 2 |
Chicago Zone 01-Calumet |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2004-02-09 |
|
| 312-731
| 3 |
Chicago Zone 01-Calumet |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2004-12-06 |
|
| 312-731
| 4 |
Chicago Zone 01-Calumet |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2004-12-06 |
|
| 312-731
| 5 |
Chicago Zone 01-Calumet |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2005-07-11 |
|
| 312-731
| 6 |
Chicago Zone 01-Calumet |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2005-07-11 |
|
| 312-731
| 7 |
Chicago Zone 01-Calumet |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2004-07-15 |
|
| 312-731
| 8 |
Chicago Zone 01-Calumet |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2004-07-15 |
|
| 312-731
| 9 |
Chicago Zone 01-Calumet |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2005-08-10 |
|
| 312-732
| A |
Chicago Zone 01-Wabash |
IL |
CHCGILWBDS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-733
| A |
Chicago Zone 01-Monroe |
IL |
CHCGILMODS1 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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