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 >>
| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 312-899
| 8 |
Chicago Zone 01-Franklin |
IL |
CHCGILFRDS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-899
| 9 |
Chicago Zone 01-Franklin |
IL |
CHCGILFRDS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-900
| A |
Chicago Zone 01-Calumet |
IL |
CHCGILWURMD |
965H FRACTEL, LLC |
358 |
|
|
|
| 312-900
| 0 |
Chicago Zone 01-Calumet |
IL |
CHCGILWURMD |
965H FRACTEL, LLC |
358 |
|
2019-03-23 |
|
| 312-900
| 1 |
Chicago Zone 01-Calumet |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2019-03-24 |
|
| 312-900
| 2 |
Chicago Zone 01-Calumet |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2019-03-24 |
|
| 312-900
| 3 |
Chicago Zone 01-Calumet |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2019-03-24 |
|
| 312-900
| 4 |
Chicago Zone 01-Calumet |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2019-03-24 |
|
| 312-900
| 5 |
Chicago Zone 01-Calumet |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2019-03-24 |
|
| 312-900
| 6 |
Chicago Zone 01-Calumet |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2019-03-24 |
|
| 312-900
| 7 |
Chicago Zone 01-Calumet |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2019-03-24 |
|
| 312-900
| 8 |
Chicago Zone 01-Calumet |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2019-06-28 |
|
| 312-900
| 9 |
Chicago Zone 01-Calumet |
IL |
CHCGILWUDS4 |
063E PEERLESS NETWORK OF ILLINOIS, LLC - IL |
358 |
|
2019-05-18 |
|
| 312-901
| A |
Chicago Zone 01-Calumet |
IL |
LBRDILGOAMD |
6630 USA MOBILITY WIRELESS, INC. |
358 |
|
|
|
| 312-902
| A |
Chicago Zone 01-Canal |
IL |
CHCGILCLDS3 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-903
| A |
Chicago Zone 01-Wabash |
IL |
CHCGILBWCM2 |
9748 AMERICAN MESSAGING SERVICES, LLC |
358 |
|
|
|
| 312-904
| A |
Chicago Zone 01-Franklin |
IL |
CHCGILFRDS1 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-905
| A |
Chicago Zone 01-Franklin |
IL |
CHCGILFRDS1 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-905
| 0 |
Chicago Zone 01-Franklin |
IL |
CHCGILFRDS1 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-905
| 1 |
Chicago Zone 01-Franklin |
IL |
CHCGILFRDS1 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-905
| 2 |
Chicago Zone 01-Franklin |
IL |
CHCGILFRDS1 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-905
| 3 |
Chicago Zone 01-Franklin |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2011-02-24 |
|
| 312-905
| 4 |
Chicago Zone 01-Franklin |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2011-02-24 |
|
| 312-905
| 5 |
Chicago Zone 01-Franklin |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2011-02-24 |
|
| 312-905
| 6 |
Chicago Zone 01-Franklin |
IL |
CHCGILFRDS1 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-905
| 7 |
Chicago Zone 01-Franklin |
IL |
CHCGILFRDS1 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-905
| 8 |
Chicago Zone 01-Franklin |
IL |
CHCGILFRDS1 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-905
| 9 |
Chicago Zone 01-Franklin |
IL |
CHCGILFRDS1 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-906
| A |
Chicago Zone 01-Canal |
IL |
CHCGILCLDS3 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-906
| 0 |
Chicago Zone 01-Canal |
IL |
CHCGILCLDS3 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-906
| 1 |
Chicago Zone 01-Canal |
IL |
CHCGILCLDS3 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-906
| 2 |
Chicago Zone 01-Canal |
IL |
CHCGILCLDS3 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-906
| 3 |
Chicago Zone 01-Canal |
IL |
CHCGILCLDS3 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-906
| 4 |
Chicago Zone 01-Canal |
IL |
CHCGILCLDS3 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-906
| 5 |
Chicago Zone 01-Canal |
IL |
CHCGILCLDS3 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-906
| 6 |
Chicago Zone 01-Canal |
IL |
CHCGILCLDS3 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-906
| 7 |
Chicago Zone 01-Canal |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2011-06-29 |
|
| 312-906
| 8 |
Chicago Zone 01-Canal |
IL |
CHCGILCLDS3 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-906
| 9 |
Chicago Zone 01-Canal |
IL |
CHCGILCLDS3 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-907
| A |
Chicago Zone 01-Calumet |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-907
| 0 |
Chicago Zone 01-Calumet |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-907
| 1 |
Chicago Zone 01-Calumet |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-907
| 2 |
Chicago Zone 01-Calumet |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-907
| 3 |
Chicago Zone 01-Calumet |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-907
| 4 |
Chicago Zone 01-Calumet |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-907
| 5 |
Chicago Zone 01-Calumet |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-907
| 6 |
Chicago Zone 01-Calumet |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-907
| 7 |
Chicago Zone 01-Calumet |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-907
| 8 |
Chicago Zone 01-Calumet |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-907
| 9 |
Chicago Zone 01-Calumet |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-908
| A |
Chicago Zone 01-Superior |
IL |
CHCGILSUDS2 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-909
| A |
Chicago Zone 01-Wabash |
IL |
RVDLILBDAMD |
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
|
|
| 312-910
| A |
Chicago Zone 01-Calumet |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
|
|
| 312-910
| 0 |
Chicago Zone 01-Calumet |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2022-11-20 |
|
| 312-910
| 1 |
Chicago Zone 01-Calumet |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2022-11-20 |
|
| 312-910
| 2 |
Chicago Zone 01-Calumet |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2022-11-20 |
|
| 312-910
| 3 |
Chicago Zone 01-Calumet |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2022-11-20 |
|
| 312-910
| 4 |
Chicago Zone 01-Calumet |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2022-11-20 |
|
| 312-910
| 5 |
Chicago Zone 01-Calumet |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2022-11-20 |
|
| 312-910
| 6 |
Chicago Zone 01-Calumet |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2022-11-20 |
|
| 312-910
| 7 |
Chicago Zone 01-Calumet |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2022-11-20 |
|
| 312-910
| 8 |
Chicago Zone 01-Calumet |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2022-11-20 |
|
| 312-910
| 9 |
Chicago Zone 01-Calumet |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2022-11-20 |
|
| 312-912
| A |
Chicago Zone 01-Canal |
IL |
CHCGILCLDS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-912
| 0 |
Chicago Zone 01-Canal |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2016-02-15 |
|
| 312-912
| 1 |
Chicago Zone 01-Canal |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2006-11-15 |
|
| 312-912
| 2 |
Chicago Zone 01-Canal |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2007-05-30 |
|
| 312-912
| 3 |
Chicago Zone 01-Canal |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2007-05-30 |
|
| 312-912
| 4 |
Chicago Zone 01-Canal |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2007-10-17 |
|
| 312-912
| 5 |
Chicago Zone 01-Canal |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2007-10-17 |
|
| 312-912
| 6 |
Chicago Zone 01-Canal |
IL |
CHCGILWUX6X |
460K FIRST COMMUNICATIONS, LLC |
358 |
|
2010-10-15 |
|
| 312-912
| 7 |
Chicago Zone 01-Canal |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2008-08-29 |
|
| 312-912
| 8 |
Chicago Zone 01-Canal |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2008-08-29 |
|
| 312-912
| 9 |
Chicago Zone 01-Canal |
IL |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2008-08-29 |
|
| 312-913
| A |
Chicago Zone 01-Wabash |
IL |
CHCGILWBDS3 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-914
| A |
Chicago Zone 01-Wabash |
IL |
RVDLILBDAMD |
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
|
|
| 312-915
| A |
Chicago Zone 01-Superior |
IL |
CHCGILSUDS2 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-917
| A |
Chicago Zone 01-Franklin |
IL |
CHCGILFRDS3 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-918
| A |
Chicago Zone 01-Calumet |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-918
| 0 |
Chicago Zone 01-Calumet |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2013-10-17 |
|
| 312-918
| 1 |
Chicago Zone 01-Calumet |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2013-10-17 |
|
| 312-918
| 2 |
Chicago Zone 01-Calumet |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2013-10-17 |
|
| 312-918
| 3 |
Chicago Zone 01-Calumet |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2013-10-17 |
|
| 312-918
| 4 |
Chicago Zone 01-Calumet |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2013-10-17 |
|
| 312-918
| 5 |
Chicago Zone 01-Calumet |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2013-10-17 |
|
| 312-918
| 6 |
Chicago Zone 01-Calumet |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2013-10-17 |
|
| 312-918
| 7 |
Chicago Zone 01-Calumet |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2013-10-17 |
|
| 312-918
| 8 |
Chicago Zone 01-Calumet |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2013-10-17 |
|
| 312-918
| 9 |
Chicago Zone 01-Calumet |
IL |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2013-10-17 |
|
| 312-919
| A |
Chicago Zone 01-Wabash |
IL |
RVDLILBDAMD |
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
|
|
| 312-920
| A |
Chicago Zone 01-Franklin |
IL |
CHCGILFRDS3 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-921
| A |
Chicago Zone 01-Calumet |
IL |
CHCGILSUDS2 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-921
| 0 |
Chicago Zone 01-Calumet |
IL |
CHCGILSUDS2 |
9329 ILLINOIS BELL TEL CO |
358 |
|
2008-09-01 |
|
| 312-921
| 1 |
Chicago Zone 01-Calumet |
IL |
CHCGILSUDS2 |
9329 ILLINOIS BELL TEL CO |
358 |
|
2008-09-01 |
|
| 312-921
| 2 |
Chicago Zone 01-Calumet |
IL |
CHCGILSUDS2 |
9329 ILLINOIS BELL TEL CO |
358 |
|
2008-09-01 |
|
| 312-921
| 3 |
Chicago Zone 01-Calumet |
IL |
CHCGILSUDS2 |
9329 ILLINOIS BELL TEL CO |
358 |
|
2008-09-01 |
|
| 312-921
| 4 |
Chicago Zone 01-Calumet |
IL |
CHCGILSUDS2 |
9329 ILLINOIS BELL TEL CO |
358 |
|
2008-09-01 |
|
| 312-921
| 5 |
Chicago Zone 01-Calumet |
IL |
CHCGILSUDS2 |
9329 ILLINOIS BELL TEL CO |
358 |
|
2008-09-01 |
|
| 312-921
| 6 |
Chicago Zone 01-Calumet |
IL |
CHCGILSUDS2 |
9329 ILLINOIS BELL TEL CO |
358 |
|
2008-09-01 |
|
| 312-921
| 7 |
Chicago Zone 01-Calumet |
IL |
CHCGILSUDS2 |
9329 ILLINOIS BELL TEL CO |
358 |
|
2008-09-01 |
|
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Last updated: Mon, 15 Sep 2025 02:24:40 UTC
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