Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

Chicago Zone 01-Wabash, IL

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
312-203 A BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-206 A BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-208 A BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-212 A CHCGILWBDS2  9329 AMERITECH ILLINOIS 358      
312-212 0   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2006-04-06   
312-212 1   9329 AMERITECH ILLINOIS 358      
312-212 2   9329 AMERITECH ILLINOIS 358      
312-212 3   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2006-04-06   
312-212 4   7056 XO ILLINOIS, INC. 358   2005-07-30   
312-212 5   7056 XO ILLINOIS, INC. 358   2005-07-30   
312-212 6   9329 AMERITECH ILLINOIS 358      
312-212 7   7056 XO ILLINOIS, INC. 358   2005-07-30   
312-212 8   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2005-12-08   
312-212 9   667E SIGECOM, LLC DBA WOW INTERNET CABLE AND PHONE 358   2007-08-02   
312-213 A BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-218 A BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-232 A CHCGILBWCM2  9748 AMERICAN MESSAGING SERVICES, LLC 358      
312-235 A CHCGILWBDS2  9329 AMERITECH ILLINOIS 358      
312-235 0   9329 AMERITECH ILLINOIS 358      
312-235 1   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2008-04-11   
312-235 2   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2005-12-08   
312-235 3   4717 PAETEC COMMUNICATIONS, INC. - IL 358   2005-11-08   
312-235 4   4604 FIRST COMMUNICATIONS LLC - IL 358   2005-11-27   
312-235 5   4604 FIRST COMMUNICATIONS LLC - IL 358   2005-11-27   
312-235 6   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2005-12-08   
312-235 7   9329 AMERITECH ILLINOIS 358      
312-235 8   9329 AMERITECH ILLINOIS 358      
312-235 9   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2010-08-16   
312-237 A HCHLILMTCM2  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-237 0   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-237 1   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-237 2   7721 BROADWING COMMUNICATIONS, LLC - IL 358   2003-01-05   
312-237 3   4717 PAETEC COMMUNICATIONS, INC. - IL 358   2008-07-02   
312-237 4   5917 FIRST COMMUNICATIONS, LLC 358   2010-06-06   
312-237 5   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-237 6   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-237 7   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-237 8   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-237 9   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-242 A CHCGILCGDS1  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-242 0   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-242 1   7721 BROADWING COMMUNICATIONS, LLC - IL 358   2000-10-13   
312-242 2   4604 FIRST COMMUNICATIONS LLC - IL 358   2002-07-03   
312-242 3   7721 BROADWING COMMUNICATIONS, LLC - IL 358   2002-04-23   
312-242 4   4604 FIRST COMMUNICATIONS LLC - IL 358   2001-07-09   
312-242 5   7721 BROADWING COMMUNICATIONS, LLC - IL 358   2001-01-17   
312-242 6   4604 FIRST COMMUNICATIONS LLC - IL 358   2001-07-09   
312-242 7   7721 BROADWING COMMUNICATIONS, LLC - IL 358   2000-11-20   
312-242 8   4604 FIRST COMMUNICATIONS LLC - IL 358   2001-07-09   
312-242 9   4604 FIRST COMMUNICATIONS LLC - IL 358   2001-07-09   

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 >>

Last updated: Sun, 10 Nov 2019 13:49:34 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.