Local Calling Guide
Area code/prefix search
Chicago Zone 01-Calumet, IL
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| NPA-NXX |
BLOCK |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 312-900
| 9 |
|
063E PEERLESS NETWORK OF ILLINOIS, LLC - IL |
358 |
|
2019-05-18 |
|
| 312-901
| A |
LBRDILGOAMD |
6630 USA MOBILITY WIRELESS, INC. |
358 |
|
|
|
| 312-907
| A |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-907
| 0 |
|
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-907
| 1 |
|
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-907
| 2 |
|
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-907
| 3 |
|
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-907
| 4 |
|
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-907
| 5 |
|
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-907
| 6 |
|
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-907
| 7 |
|
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-907
| 8 |
|
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-907
| 9 |
|
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-910
| A |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
|
|
| 312-910
| 0 |
|
224C ONVOY, LLC |
358 |
|
2022-11-20 |
|
| 312-910
| 1 |
|
224C ONVOY, LLC |
358 |
|
2022-11-20 |
|
| 312-910
| 2 |
|
224C ONVOY, LLC |
358 |
|
2022-11-20 |
|
| 312-910
| 3 |
|
224C ONVOY, LLC |
358 |
|
2022-11-20 |
|
| 312-910
| 4 |
|
224C ONVOY, LLC |
358 |
|
2022-11-20 |
|
| 312-910
| 5 |
|
224C ONVOY, LLC |
358 |
|
2022-11-20 |
|
| 312-910
| 6 |
|
224C ONVOY, LLC |
358 |
|
2022-11-20 |
|
| 312-910
| 7 |
|
224C ONVOY, LLC |
358 |
|
2022-11-20 |
|
| 312-910
| 8 |
|
224C ONVOY, LLC |
358 |
|
2022-11-20 |
|
| 312-910
| 9 |
|
224C ONVOY, LLC |
358 |
|
2022-11-20 |
|
| 312-918
| A |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-918
| 0 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2013-10-17 |
|
| 312-918
| 1 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2013-10-17 |
|
| 312-918
| 2 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2013-10-17 |
|
| 312-918
| 3 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2013-10-17 |
|
| 312-918
| 4 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2013-10-17 |
|
| 312-918
| 5 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2013-10-17 |
|
| 312-918
| 6 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2013-10-17 |
|
| 312-918
| 7 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2013-10-17 |
|
| 312-918
| 8 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2013-10-17 |
|
| 312-918
| 9 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2013-10-17 |
|
| 312-921
| A |
CHCGILSUDS2 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-921
| 0 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
2008-09-01 |
|
| 312-921
| 1 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
2008-09-01 |
|
| 312-921
| 2 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
2008-09-01 |
|
| 312-921
| 3 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
2008-09-01 |
|
| 312-921
| 4 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
2008-09-01 |
|
| 312-921
| 5 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
2008-09-01 |
|
| 312-921
| 6 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
2008-09-01 |
|
| 312-921
| 7 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
2008-09-01 |
|
| 312-921
| 8 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
2008-09-01 |
|
| 312-921
| 9 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
2008-09-01 |
|
| 312-924
| A |
CHCGILWBXWZ |
829J PAETEC ITEL, LLC |
358 |
|
2024-12-09 |
|
| 312-929
| A |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
|
|
| 312-929
| 0 |
|
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
358 |
|
2011-06-12 |
|
| 312-929
| 1 |
|
829J PAETEC ITEL, LLC |
358 |
|
2009-12-14 |
|
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Last updated: Thu, 29 Jan 2026 14:35:03 UTC
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