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 |
| 312-503
| A |
Chicago Zone 01-Calumet |
IL |
CHCGILCGDS1 |
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
|
|
| 312-503
| 0 |
Chicago Zone 01-Calumet |
IL |
|
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
|
|
| 312-503
| 1 |
Chicago Zone 01-Calumet |
IL |
|
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
|
|
| 312-503
| 2 |
Chicago Zone 01-Calumet |
IL |
|
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
|
|
| 312-503
| 3 |
Chicago Zone 01-Calumet |
IL |
|
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
|
|
| 312-503
| 4 |
Chicago Zone 01-Calumet |
IL |
|
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
|
|
| 312-503
| 5 |
Chicago Zone 01-Calumet |
IL |
|
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
|
|
| 312-503
| 6 |
Chicago Zone 01-Calumet |
IL |
|
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
|
|
| 312-503
| 7 |
Chicago Zone 01-Calumet |
IL |
|
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
|
|
| 312-503
| 8 |
Chicago Zone 01-Calumet |
IL |
|
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
|
|
| 312-503
| 9 |
Chicago Zone 01-Calumet |
IL |
|
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
|
|
| 312-504
| A |
Chicago Zone 01-Wabash |
IL |
BURGILAHGT3 |
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
|
|
| 312-505
| A |
Chicago Zone 01-Wabash |
IL |
RVDLILBDAMD |
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
|
|
| 312-506
| A |
Chicago Zone 01-Calumet |
IL |
CHCGILWUX6X |
460K FIRST COMMUNICATIONS, LLC |
358 |
|
|
|
| 312-506
| 0 |
Chicago Zone 01-Calumet |
IL |
|
460K FIRST COMMUNICATIONS, LLC |
358 |
|
2004-07-15 |
|
| 312-506
| 1 |
Chicago Zone 01-Calumet |
IL |
|
460K FIRST COMMUNICATIONS, LLC |
358 |
|
2004-07-15 |
|
| 312-506
| 2 |
Chicago Zone 01-Calumet |
IL |
|
460K FIRST COMMUNICATIONS, LLC |
358 |
|
2004-07-15 |
|
| 312-506
| 3 |
Chicago Zone 01-Calumet |
IL |
|
460K FIRST COMMUNICATIONS, LLC |
358 |
|
2004-07-15 |
|
| 312-506
| 4 |
Chicago Zone 01-Calumet |
IL |
|
460K FIRST COMMUNICATIONS, LLC |
358 |
|
2008-04-03 |
|
| 312-506
| 5 |
Chicago Zone 01-Calumet |
IL |
|
829J PAETEC ITEL, LLC |
358 |
|
2006-05-20 |
|
| 312-506
| 6 |
Chicago Zone 01-Calumet |
IL |
|
460K FIRST COMMUNICATIONS, LLC |
358 |
|
2004-07-15 |
|
| 312-506
| 7 |
Chicago Zone 01-Calumet |
IL |
|
5562 METROPCS, INC. |
358 |
|
2005-01-15 |
|
| 312-506
| 8 |
Chicago Zone 01-Calumet |
IL |
|
829J PAETEC ITEL, LLC |
358 |
|
2006-06-04 |
|
| 312-506
| 9 |
Chicago Zone 01-Calumet |
IL |
|
460K FIRST COMMUNICATIONS, LLC |
358 |
|
2004-07-15 |
|
| 312-507
| A |
Chicago Zone 01-Franklin |
IL |
CHCGILFRDS4 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-507
| 0 |
Chicago Zone 01-Franklin |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-507
| 1 |
Chicago Zone 01-Franklin |
IL |
|
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
2011-02-07 |
|
| 312-507
| 2 |
Chicago Zone 01-Franklin |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-507
| 3 |
Chicago Zone 01-Franklin |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-507
| 4 |
Chicago Zone 01-Franklin |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-507
| 5 |
Chicago Zone 01-Franklin |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-507
| 6 |
Chicago Zone 01-Franklin |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-507
| 7 |
Chicago Zone 01-Franklin |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-507
| 8 |
Chicago Zone 01-Franklin |
IL |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-507
| 9 |
Chicago Zone 01-Franklin |
IL |
|
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
2011-02-07 |
|
| 312-508
| A |
Chicago Zone 01-Calumet |
IL |
CHCGILWUDS4 |
063E PEERLESS NETWORK OF ILLINOIS, LLC - IL |
358 |
|
|
|
| 312-508
| 0 |
Chicago Zone 01-Calumet |
IL |
|
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
2012-06-06 |
|
| 312-508
| 1 |
Chicago Zone 01-Calumet |
IL |
|
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
2012-06-06 |
|
| 312-508
| 2 |
Chicago Zone 01-Calumet |
IL |
|
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
2012-06-22 |
|
| 312-508
| 3 |
Chicago Zone 01-Calumet |
IL |
|
063E PEERLESS NETWORK OF ILLINOIS, LLC - IL |
358 |
|
2012-05-10 |
|
| 312-508
| 4 |
Chicago Zone 01-Calumet |
IL |
|
063E PEERLESS NETWORK OF ILLINOIS, LLC - IL |
358 |
|
2012-05-10 |
|
| 312-508
| 5 |
Chicago Zone 01-Calumet |
IL |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2012-06-17 |
|
| 312-508
| 6 |
Chicago Zone 01-Calumet |
IL |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2012-06-17 |
|
| 312-508
| 7 |
Chicago Zone 01-Calumet |
IL |
|
046L CLEAR RATE COMMUNICATIONS, LLC |
358 |
|
2012-06-10 |
|
| 312-508
| 8 |
Chicago Zone 01-Calumet |
IL |
|
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
2012-06-06 |
|
| 312-508
| 9 |
Chicago Zone 01-Calumet |
IL |
|
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
2012-06-06 |
|
| 312-509
| A |
Chicago Zone 01-Calumet |
IL |
CHCGILWUDS4 |
063E PEERLESS NETWORK OF ILLINOIS, LLC - IL |
358 |
|
|
|
| 312-509
| 0 |
Chicago Zone 01-Calumet |
IL |
|
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
2012-05-05 |
|
| 312-509
| 1 |
Chicago Zone 01-Calumet |
IL |
|
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
2012-05-05 |
|
| 312-509
| 2 |
Chicago Zone 01-Calumet |
IL |
|
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
2012-05-05 |
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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