Local Calling Guide
Area code/prefix search
Chicago Zone 01-Illinois Dearborn, IL
| NPA-NXX |
BLOCK |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 312-222
| A |
CHCGILIDDS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-229
| A |
CHCGILIDDS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-229
| 0 |
|
6115 LEVEL 3 COMMUNICATIONS, LLC - IL |
358 |
|
2008-06-06 |
|
| 312-229
| 1 |
|
829J PAETEC ITEL, LLC |
358 |
|
2000-03-10 |
|
| 312-229
| 2 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-229
| 3 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-229
| 4 |
|
829J PAETEC ITEL, LLC |
358 |
|
2000-03-10 |
|
| 312-229
| 5 |
|
829J PAETEC ITEL, LLC |
358 |
|
2000-03-10 |
|
| 312-229
| 6 |
|
829J PAETEC ITEL, LLC |
358 |
|
2000-03-10 |
|
| 312-229
| 7 |
|
829J PAETEC ITEL, LLC |
358 |
|
2000-03-10 |
|
| 312-229
| 8 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-229
| 9 |
|
829J PAETEC ITEL, LLC |
358 |
|
2008-07-02 |
|
| 312-245
| A |
CHCGILIDDS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-321
| A |
CHCGILIDDS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-329
| A |
CHCGILIDDS2 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-396
| A |
CHCGILIDDS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-410
| A |
CHCGILIDDS2 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-464
| A |
CHCGILIDDS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-467
| A |
CHCGILIDDS2 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-494
| A |
CHCGILIDDS2 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-527
| A |
CHCGILIDDS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-595
| A |
CHCGILIDDS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-644
| A |
CHCGILIDDS2 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-645
| A |
CHCGILIDDS2 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-661
| A |
CHCGILIDDS2 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-661
| 0 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-661
| 1 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-661
| 2 |
|
6534 NEW CINGULAR WIRELESS PCS, LLC - IL |
358 |
|
2013-02-08 |
|
| 312-661
| 3 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-661
| 4 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-661
| 5 |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2014-05-24 |
|
| 312-661
| 6 |
|
6529 T-MOBILE USA, INC. |
358 |
|
2011-05-26 |
|
| 312-661
| 7 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-661
| 8 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-661
| 9 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-670
| A |
CHCGILIDDS2 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-742
| A |
CHCGILIDDS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-744
| A |
CHCGILIDDS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-755
| A |
CHCGILIDDS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-817
| A |
CHCGILIDDS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-822
| A |
CHCGILIDDS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-828
| A |
CHCGILIDDS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-832
| A |
CHCGILIDDS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-836
| A |
CHCGILIDDS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-840
| A |
CHCGILIDDS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-923
| A |
CHCGILIDDS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-955
| A |
CHCGILACGT0 |
8702 RCN TELECOM SERVICES OF ILLINIOS, INC. - IL |
358 |
|
|
|
| 312-970
| A |
CHCGILIDDS0 |
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-970
| 0 |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2009-01-13 |
|
| 312-970
| 1 |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2010-03-04 |
|
| 312-970
| 2 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-970
| 3 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-970
| 4 |
|
5562 METROPCS, INC. |
358 |
|
2016-12-29 |
|
| 312-970
| 5 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-970
| 6 |
|
5562 METROPCS, INC. |
358 |
|
2017-01-23 |
|
| 312-970
| 7 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
2001-04-23 |
|
| 312-970
| 8 |
|
9329 ILLINOIS BELL TEL CO |
358 |
|
|
|
| 312-970
| 9 |
|
984E BANDWIDTH.COM CLEC, LLC - IL |
358 |
|
2009-01-13 |
|
Last updated: Thu, 01 Jan 2026 03:59:49 UTC
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