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 |
| 312-785
| 9 |
BURGILAHGT3 |
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
2014-10-03 |
|
| 312-791
| A |
CHCGILCADS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-791
| 0 |
CHCGILCADS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-791
| 1 |
CHCGILCADS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-791
| 2 |
CHCGILCADS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-791
| 3 |
CHCGILCADS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-791
| 4 |
CHCGILCADS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-791
| 5 |
CHCGILCADS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-791
| 6 |
CHCGILCADS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-791
| 7 |
CHCGILCADS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-791
| 8 |
CHCGILCADS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-791
| 9 |
|
145J TERRA NOVA TELECOM INC. |
358 |
|
2025-04-09 |
|
| 312-792
| A |
BNSVILDGDS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
358 |
|
|
|
| 312-792
| 0 |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2015-01-13 |
|
| 312-792
| 1 |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2015-01-13 |
|
| 312-792
| 2 |
CHCGILWUIMD |
197D VONAGE AMERICA LLC |
358 |
|
2025-10-21 |
|
| 312-792
| 3 |
BNSVILDGDS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
358 |
|
2015-01-11 |
|
| 312-792
| 4 |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2015-01-13 |
|
| 312-792
| 5 |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2015-01-13 |
|
| 312-792
| 6 |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2015-01-13 |
|
| 312-792
| 7 |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2015-01-13 |
|
| 312-792
| 8 |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2015-01-13 |
|
| 312-792
| 9 |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2015-01-13 |
|
| 312-796
| A |
CHCGILWUDS4 |
063E PEERLESS NETWORK OF ILLINOIS, LLC - IL |
358 |
|
|
|
| 312-796
| 0 |
CHCGILWUDS4 |
063E PEERLESS NETWORK OF ILLINOIS, LLC - IL |
358 |
|
2016-09-16 |
|
| 312-796
| 1 |
RVDLILBDAMD |
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
2016-10-11 |
|
| 312-796
| 2 |
CHCGILCPDS9 |
138G LEVEL 3 TELECOM OF ILLINOIS, LLC - IL |
358 |
|
2016-09-17 |
|
| 312-796
| 3 |
CHCGILNEXJX |
318J COMCAST IP PHONE, LLC |
358 |
|
2016-09-17 |
|
| 312-796
| 4 |
RVDLILBDAMD |
6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL |
358 |
|
2016-10-11 |
|
| 312-796
| 5 |
CHCGILWBXDZ |
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2016-09-17 |
|
| 312-796
| 6 |
CHCGILWBXDZ |
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2016-09-17 |
|
| 312-796
| 7 |
CHCGILWBXDZ |
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2016-09-17 |
|
| 312-796
| 8 |
CHCGILWBXDZ |
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2016-09-17 |
|
| 312-796
| 9 |
CHCGILWBXDZ |
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2016-09-17 |
|
| 312-800
| A |
CHCGILWUDS4 |
063E PEERLESS NETWORK OF ILLINOIS, LLC - IL |
358 |
|
|
|
| 312-800
| 0 |
CHCGILWUDS4 |
063E PEERLESS NETWORK OF ILLINOIS, LLC - IL |
358 |
|
2013-01-11 |
|
| 312-800
| 1 |
CHCGILGMDS7 |
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2013-01-27 |
|
| 312-800
| 2 |
CHCGILGMDS7 |
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2013-01-27 |
|
| 312-800
| 3 |
BURGILAHGT3 |
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
2013-02-08 |
|
| 312-800
| 4 |
CHCGILWBXWZ |
829J PAETEC ITEL, LLC |
358 |
|
2013-01-15 |
|
| 312-800
| 5 |
CHCGILWBXWZ |
829J PAETEC ITEL, LLC |
358 |
|
2013-01-15 |
|
| 312-800
| 6 |
CHCGILCLDS7 |
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
2013-01-30 |
|
| 312-800
| 7 |
CHCGILCLDS7 |
7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL |
358 |
|
2013-01-30 |
|
| 312-800
| 8 |
CHCGILWUDS4 |
063E PEERLESS NETWORK OF ILLINOIS, LLC - IL |
358 |
|
2013-01-11 |
|
| 312-800
| 9 |
CHCGILWUDS4 |
063E PEERLESS NETWORK OF ILLINOIS, LLC - IL |
358 |
|
2013-01-30 |
|
| 312-801
| A |
CHCGILIDX9X |
551G NUSO, LLC |
358 |
|
|
|
| 312-801
| 0 |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2013-11-14 |
|
| 312-801
| 1 |
CHCGILIDX9X |
551G NUSO, LLC |
358 |
|
2013-06-28 |
|
| 312-801
| 2 |
CHCGILWBXDZ |
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2013-07-01 |
|
| 312-801
| 3 |
CHCGILWBXDZ |
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2013-07-01 |
|
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Last updated: Sat, 01 Aug 2026 03:19:33 UTC
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