Local Calling Guide
Area code/prefix search
Chicago Zone 01-Monroe, IL
1 2 3 >>
| NPA-NXX |
BLOCK |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 312-226
| A |
CHCGILMODS1 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-243
| A |
CHCGILMODS1 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-260
| A |
BNSVILDGDS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
358 |
|
|
|
| 312-260
| 0 |
BNSVILDGDS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
358 |
|
|
|
| 312-260
| 1 |
BNSVILDGDS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
358 |
|
|
|
| 312-260
| 2 |
BNSVILDGDS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
358 |
|
|
|
| 312-260
| 3 |
BNSVILDGDS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
358 |
|
|
|
| 312-260
| 4 |
BNSVILDGDS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
358 |
|
|
|
| 312-260
| 5 |
BNSVILDGDS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
358 |
|
|
|
| 312-260
| 6 |
BNSVILDGDS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
358 |
|
|
|
| 312-260
| 7 |
BNSVILDGDS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
358 |
|
2005-12-12 |
|
| 312-260
| 8 |
BNSVILDGDS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
358 |
|
|
|
| 312-260
| 9 |
BNSVILDGDS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
358 |
|
|
|
| 312-279
| A |
BNSVILDGDS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
358 |
|
|
|
| 312-355
| A |
CHCGILMODS1 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-361
| A |
CHCGILMODS1 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-361
| 0 |
CHCGILGMDS7 |
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2006-12-09 |
|
| 312-361
| 1 |
CHCGILGMDS7 |
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2010-07-14 |
|
| 312-361
| 2 |
CHCGILMODS1 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-361
| 3 |
CHCGILGMDS7 |
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2010-07-14 |
|
| 312-361
| 4 |
BURGILAHGT3 |
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
2011-06-23 |
|
| 312-361
| 5 |
CHCGIL24DS6 |
224C ONVOY, LLC |
358 |
|
2010-10-27 |
|
| 312-361
| 6 |
CHCGILMODS1 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-361
| 7 |
BURGILAHGT3 |
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
2011-06-23 |
|
| 312-361
| 8 |
CHCGILGMDS7 |
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2006-12-09 |
|
| 312-361
| 9 |
DWGVILMCPS0 |
7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC |
358 |
|
2010-10-27 |
|
| 312-363
| A |
CHCGILACGT0 |
8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL |
358 |
|
|
|
| 312-363
| 0 |
CHCGILACGT0 |
8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL |
358 |
|
|
|
| 312-363
| 1 |
CHCGILACGT0 |
8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL |
358 |
|
|
|
| 312-363
| 2 |
CHCGILACGT0 |
8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL |
358 |
|
|
|
| 312-363
| 3 |
CHCGILACGT0 |
8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL |
358 |
|
|
|
| 312-363
| 4 |
CHCGILACGT0 |
8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL |
358 |
|
|
|
| 312-363
| 5 |
CHCGILACGT0 |
8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL |
358 |
|
|
|
| 312-363
| 6 |
CHCGILWUX6X |
460K FIRST COMMUNICATIONS, LLC |
358 |
|
2004-06-06 |
|
| 312-363
| 7 |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2004-07-15 |
|
| 312-363
| 8 |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2004-07-15 |
|
| 312-363
| 9 |
ELGNILOTGT5 |
6529 T-MOBILE USA, INC. |
358 |
|
2004-07-15 |
|
| 312-413
| A |
CHCGILMODS1 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-421
| A |
CHCGILMODS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-432
| A |
CHCGILMODS1 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-433
| A |
CHCGILMODS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-433
| 0 |
CHCGILMODS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-433
| 1 |
CHCGILMODS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-433
| 2 |
CHCGILMODS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-433
| 3 |
CHCGILMODS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-433
| 4 |
CHCGILMODS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-433
| 5 |
CHCGILMODS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-433
| 6 |
CHCGILMODS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-433
| 7 |
CHCGILMODS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-433
| 8 |
CHCGILMODS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
1 2 3 >>
Last updated: Wed, 04 Mar 2026 03:00:52 UTC
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