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 |
| 312-743
| 0 |
Chicago Zone 01-Monroe |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-743
| 1 |
Chicago Zone 01-Monroe |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-743
| 2 |
Chicago Zone 01-Monroe |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-743
| 3 |
Chicago Zone 01-Monroe |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-743
| 4 |
Chicago Zone 01-Monroe |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-743
| 5 |
Chicago Zone 01-Monroe |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-743
| 6 |
Chicago Zone 01-Monroe |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-743
| 7 |
Chicago Zone 01-Monroe |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-743
| 8 |
Chicago Zone 01-Monroe |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-743
| 9 |
Chicago Zone 01-Monroe |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-744
| A |
Chicago Zone 01-Illinois Dearborn |
IL |
CHCGILIDDS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-745
| A |
Chicago Zone 01-Wabash |
IL |
CHCGILWBDS2 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-746
| A |
Chicago Zone 01-Monroe |
IL |
CHCGILMODS1 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-747
| A |
Chicago Zone 01-Wabash |
IL |
CHCGILWBDS2 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-748
| A |
Chicago Zone 01-Calumet |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
|
|
| 312-748
| 0 |
Chicago Zone 01-Calumet |
IL |
|
224C ONVOY, LLC |
358 |
|
2023-07-24 |
|
| 312-748
| 1 |
Chicago Zone 01-Calumet |
IL |
|
224C ONVOY, LLC |
358 |
|
2023-07-24 |
|
| 312-748
| 2 |
Chicago Zone 01-Calumet |
IL |
|
224C ONVOY, LLC |
358 |
|
2023-07-24 |
|
| 312-748
| 3 |
Chicago Zone 01-Calumet |
IL |
|
224C ONVOY, LLC |
358 |
|
2023-07-24 |
|
| 312-748
| 4 |
Chicago Zone 01-Calumet |
IL |
|
224C ONVOY, LLC |
358 |
|
2023-07-24 |
|
| 312-748
| 5 |
Chicago Zone 01-Calumet |
IL |
|
224C ONVOY, LLC |
358 |
|
2023-07-24 |
|
| 312-748
| 6 |
Chicago Zone 01-Calumet |
IL |
|
224C ONVOY, LLC |
358 |
|
2023-07-24 |
|
| 312-748
| 7 |
Chicago Zone 01-Calumet |
IL |
|
224C ONVOY, LLC |
358 |
|
2023-07-24 |
|
| 312-748
| 8 |
Chicago Zone 01-Calumet |
IL |
|
224C ONVOY, LLC |
358 |
|
2023-07-24 |
|
| 312-748
| 9 |
Chicago Zone 01-Calumet |
IL |
|
224C ONVOY, LLC |
358 |
|
2023-07-24 |
|
| 312-749
| A |
Hinsdale |
IL |
BURGILAHGT3 |
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
|
|
| 312-749
| 7 |
Hinsdale |
IL |
|
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
|
|
| 312-750
| A |
Chicago Zone 01-Franklin |
IL |
CHCGILFRDS3 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-751
| A |
Chicago Zone 01-Superior |
IL |
CHCGILSUDS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-752
| A |
Chicago Zone 01-Calumet |
IL |
CHCGILGMDS7 |
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
|
|
| 312-752
| 0 |
Chicago Zone 01-Calumet |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2004-11-20 |
|
| 312-752
| 1 |
Chicago Zone 01-Calumet |
IL |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2002-06-11 |
|
| 312-752
| 2 |
Chicago Zone 01-Calumet |
IL |
|
624H ONVOY SPECTRUM, LLC |
358 |
|
2022-06-28 |
|
| 312-752
| 3 |
Chicago Zone 01-Calumet |
IL |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2002-06-11 |
|
| 312-752
| 4 |
Chicago Zone 01-Calumet |
IL |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2002-06-11 |
|
| 312-752
| 5 |
Chicago Zone 01-Calumet |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2004-10-05 |
|
| 312-752
| 6 |
Chicago Zone 01-Calumet |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2004-10-05 |
|
| 312-752
| 7 |
Chicago Zone 01-Calumet |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2004-10-05 |
|
| 312-752
| 8 |
Chicago Zone 01-Calumet |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2004-11-20 |
|
| 312-752
| 9 |
Chicago Zone 01-Calumet |
IL |
|
624H ONVOY SPECTRUM, LLC |
358 |
|
2022-06-28 |
|
| 312-753
| A |
Chicago Zone 01-Wabash |
IL |
CHCGILACGT0 |
8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL |
358 |
|
|
|
| 312-753
| 0 |
Chicago Zone 01-Wabash |
IL |
|
8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL |
358 |
|
|
|
| 312-753
| 1 |
Chicago Zone 01-Wabash |
IL |
|
8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL |
358 |
|
|
|
| 312-753
| 2 |
Chicago Zone 01-Wabash |
IL |
|
8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL |
358 |
|
|
|
| 312-753
| 3 |
Chicago Zone 01-Wabash |
IL |
|
8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL |
358 |
|
|
|
| 312-753
| 4 |
Chicago Zone 01-Wabash |
IL |
|
8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL |
358 |
|
|
|
| 312-753
| 5 |
Chicago Zone 01-Wabash |
IL |
|
8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL |
358 |
|
|
|
| 312-753
| 6 |
Chicago Zone 01-Wabash |
IL |
|
829J PAETEC ITEL, LLC |
358 |
|
2005-01-02 |
|
| 312-753
| 7 |
Chicago Zone 01-Wabash |
IL |
|
829J PAETEC ITEL, LLC |
358 |
|
2005-01-02 |
|
| 312-753
| 8 |
Chicago Zone 01-Wabash |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2005-06-19 |
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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