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 |
| 312-708
| 4 |
Chicago Zone 01-Calumet |
IL |
|
624H ONVOY SPECTRUM, LLC |
358 |
|
2024-04-24 |
|
| 312-708
| 5 |
Chicago Zone 01-Calumet |
IL |
|
624H ONVOY SPECTRUM, LLC |
358 |
|
2024-04-24 |
|
| 312-708
| 6 |
Chicago Zone 01-Calumet |
IL |
|
624H ONVOY SPECTRUM, LLC |
358 |
|
2024-04-24 |
|
| 312-708
| 7 |
Chicago Zone 01-Calumet |
IL |
|
624H ONVOY SPECTRUM, LLC |
358 |
|
2024-04-24 |
|
| 312-708
| 8 |
Chicago Zone 01-Calumet |
IL |
|
624H ONVOY SPECTRUM, LLC |
358 |
|
2024-04-24 |
|
| 312-708
| 9 |
Chicago Zone 01-Calumet |
IL |
|
624H ONVOY SPECTRUM, LLC |
358 |
|
2024-04-24 |
|
| 312-709
| A |
Chicago Zone 01-Calumet |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-709
| 0 |
Chicago Zone 01-Calumet |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2013-07-11 |
|
| 312-709
| 1 |
Chicago Zone 01-Calumet |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2013-07-11 |
|
| 312-709
| 2 |
Chicago Zone 01-Calumet |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2013-07-11 |
|
| 312-709
| 3 |
Chicago Zone 01-Calumet |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2013-07-11 |
|
| 312-709
| 4 |
Chicago Zone 01-Calumet |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2013-07-11 |
|
| 312-709
| 5 |
Chicago Zone 01-Calumet |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2013-07-11 |
|
| 312-709
| 6 |
Chicago Zone 01-Calumet |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2013-07-11 |
|
| 312-709
| 7 |
Chicago Zone 01-Calumet |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2013-07-11 |
|
| 312-709
| 8 |
Chicago Zone 01-Calumet |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2013-07-11 |
|
| 312-709
| 9 |
Chicago Zone 01-Calumet |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2013-07-11 |
|
| 312-710
| A |
Chicago Zone 01-Monroe |
IL |
CHCGILMODS1 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-712
| A |
Chicago Zone 01-Superior |
IL |
CHCGILSUDS2 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-713
| A |
Chicago Zone 01-Wabash |
IL |
CHCGILBWCM2 |
9748 AMERICAN MESSAGING SERVICES, LLC |
358 |
|
|
|
| 312-714
| A |
Chicago Zone 01-Canal |
IL |
CHCGILCLDS3 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-714
| 0 |
Chicago Zone 01-Canal |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2006-10-01 |
|
| 312-714
| 1 |
Chicago Zone 01-Canal |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-714
| 2 |
Chicago Zone 01-Canal |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2006-08-18 |
|
| 312-714
| 3 |
Chicago Zone 01-Canal |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2006-08-18 |
|
| 312-714
| 4 |
Chicago Zone 01-Canal |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2006-08-18 |
|
| 312-714
| 5 |
Chicago Zone 01-Canal |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2006-09-18 |
|
| 312-714
| 6 |
Chicago Zone 01-Canal |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2006-09-18 |
|
| 312-714
| 7 |
Chicago Zone 01-Canal |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2007-04-16 |
|
| 312-714
| 8 |
Chicago Zone 01-Canal |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2007-05-01 |
|
| 312-714
| 9 |
Chicago Zone 01-Canal |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2007-05-01 |
|
| 312-715
| A |
Chicago Zone 01-Canal |
IL |
CHCGILCLDS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-715
| 0 |
Chicago Zone 01-Canal |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-715
| 1 |
Chicago Zone 01-Canal |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-715
| 2 |
Chicago Zone 01-Canal |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-715
| 3 |
Chicago Zone 01-Canal |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-715
| 4 |
Chicago Zone 01-Canal |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
2011-05-26 |
|
| 312-715
| 5 |
Chicago Zone 01-Canal |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-715
| 6 |
Chicago Zone 01-Canal |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-715
| 7 |
Chicago Zone 01-Canal |
IL |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2010-03-04 |
|
| 312-715
| 8 |
Chicago Zone 01-Canal |
IL |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2010-03-04 |
|
| 312-715
| 9 |
Chicago Zone 01-Canal |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-716
| A |
Chicago Zone 01-Canal |
IL |
CHCGILCLDS3 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-717
| A |
La Grange |
IL |
LBRDILGOAMD |
6630 USA MOBILITY WIRELESS, INC. |
358 |
|
|
|
| 312-718
| A |
Chicago Zone 01-Wabash |
IL |
RVDLILBDAMD |
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
|
|
| 312-719
| A |
Chicago Zone 01-Calumet |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-719
| 0 |
Chicago Zone 01-Calumet |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-719
| 1 |
Chicago Zone 01-Calumet |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-719
| 2 |
Chicago Zone 01-Calumet |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-719
| 3 |
Chicago Zone 01-Calumet |
IL |
|
6529 T-MOBILE USA, INC. |
358 |
|
|
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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