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 |
| 312-753
| 9 |
Chicago Zone 01-Wabash |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2005-06-19 |
|
| 312-754
| A |
Chicago Zone 01-Calumet |
IL |
CHCGILCPDS9 |
138G LEVEL 3 TELECOM OF ILLINOIS, LLC - IL |
358 |
|
|
|
| 312-754
| 0 |
Chicago Zone 01-Calumet |
IL |
|
318J COMCAST IP PHONE, LLC |
358 |
|
2013-09-18 |
|
| 312-754
| 1 |
Chicago Zone 01-Calumet |
IL |
|
224C ONVOY, LLC |
358 |
|
2013-04-26 |
|
| 312-754
| 2 |
Chicago Zone 01-Calumet |
IL |
|
138G LEVEL 3 TELECOM OF ILLINOIS, LLC - IL |
358 |
|
2013-04-25 |
|
| 312-754
| 3 |
Chicago Zone 01-Calumet |
IL |
|
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
2013-06-24 |
|
| 312-754
| 4 |
Chicago Zone 01-Calumet |
IL |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2013-08-03 |
|
| 312-754
| 5 |
Chicago Zone 01-Calumet |
IL |
|
5562 METROPCS, INC. |
358 |
|
2013-04-26 |
|
| 312-754
| 6 |
Chicago Zone 01-Calumet |
IL |
|
829J PAETEC ITEL, LLC |
358 |
|
2014-01-21 |
|
| 312-754
| 7 |
Chicago Zone 01-Calumet |
IL |
|
829J PAETEC ITEL, LLC |
358 |
|
2014-01-21 |
|
| 312-754
| 8 |
Chicago Zone 01-Calumet |
IL |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2014-02-06 |
|
| 312-754
| 9 |
Chicago Zone 01-Calumet |
IL |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2014-02-06 |
|
| 312-755
| A |
Chicago Zone 01-Illinois Dearborn |
IL |
CHCGILIDDS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-756
| A |
Chicago Zone 01-Canal |
IL |
CHCGILCLDS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-756
| 0 |
Chicago Zone 01-Canal |
IL |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2011-04-13 |
|
| 312-756
| 1 |
Chicago Zone 01-Canal |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-756
| 2 |
Chicago Zone 01-Canal |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-756
| 3 |
Chicago Zone 01-Canal |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-756
| 4 |
Chicago Zone 01-Canal |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-756
| 5 |
Chicago Zone 01-Canal |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-756
| 6 |
Chicago Zone 01-Canal |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-756
| 7 |
Chicago Zone 01-Canal |
IL |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2011-04-13 |
|
| 312-756
| 8 |
Chicago Zone 01-Canal |
IL |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2018-09-01 |
|
| 312-756
| 9 |
Chicago Zone 01-Canal |
IL |
|
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
2013-02-08 |
|
| 312-757
| A |
Chicago Zone 01-Calumet |
IL |
CHCGILWBXDZ |
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
|
|
| 312-757
| 0 |
Chicago Zone 01-Calumet |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2013-11-14 |
|
| 312-757
| 1 |
Chicago Zone 01-Calumet |
IL |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2013-06-23 |
|
| 312-757
| 2 |
Chicago Zone 01-Calumet |
IL |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2013-06-23 |
|
| 312-757
| 3 |
Chicago Zone 01-Calumet |
IL |
|
224C ONVOY, LLC |
358 |
|
2023-09-15 |
|
| 312-757
| 4 |
Chicago Zone 01-Calumet |
IL |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2013-06-23 |
|
| 312-757
| 5 |
Chicago Zone 01-Calumet |
IL |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2013-06-23 |
|
| 312-757
| 6 |
Chicago Zone 01-Calumet |
IL |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2013-06-23 |
|
| 312-757
| 7 |
Chicago Zone 01-Calumet |
IL |
|
224C ONVOY, LLC |
358 |
|
2013-08-15 |
|
| 312-757
| 8 |
Chicago Zone 01-Calumet |
IL |
|
224C ONVOY, LLC |
358 |
|
2013-08-15 |
|
| 312-757
| 9 |
Chicago Zone 01-Calumet |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2013-11-14 |
|
| 312-758
| A |
Chicago Zone 01-Wabash |
IL |
RVDLILBDAMD |
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
|
|
| 312-759
| A |
Chicago Zone 01-Franklin |
IL |
CHCGILFRDS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-759
| 0 |
Chicago Zone 01-Franklin |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-759
| 1 |
Chicago Zone 01-Franklin |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-759
| 2 |
Chicago Zone 01-Franklin |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-759
| 3 |
Chicago Zone 01-Franklin |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-759
| 4 |
Chicago Zone 01-Franklin |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-759
| 5 |
Chicago Zone 01-Franklin |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-759
| 6 |
Chicago Zone 01-Franklin |
IL |
|
624H ONVOY SPECTRUM, LLC |
358 |
|
2022-01-07 |
|
| 312-759
| 7 |
Chicago Zone 01-Franklin |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-759
| 8 |
Chicago Zone 01-Franklin |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-759
| 9 |
Chicago Zone 01-Franklin |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-760
| A |
Chicago Zone 01-Wabash |
IL |
CHCGILBWCM2 |
9748 AMERICAN MESSAGING SERVICES, LLC |
358 |
|
|
|
| 312-761
| A |
Chicago Zone 01-Calumet |
IL |
CHCGILWUQMD |
148J TELENGY LLC |
358 |
|
|
|
| 312-761
| 0 |
Chicago Zone 01-Calumet |
IL |
|
148J TELENGY LLC |
358 |
|
2018-07-09 |
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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