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-Calumet, IL

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 >>

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
312-340 A ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
312-340 0   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2013-03-19   
312-340 1   6529 T-MOBILE USA, INC. 358   2011-11-22   
312-340 2   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2011-11-23   
312-340 3   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2011-11-23   
312-340 4   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2011-12-17   
312-340 5   829J PAETEC ITEL, LLC 358   2011-11-22   
312-340 6   829J PAETEC ITEL, LLC 358   2011-11-23   
312-340 7   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2011-12-17   
312-340 8   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2011-12-17   
312-340 9   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2011-12-17   
312-348 A CHCGIL24DS6  224C ONVOY, LLC 358      
312-348 0   5562 METROPCS, INC. 358   2009-05-22   
312-348 1   5447 ACCESS ONE, INC. - IL 358   2009-02-21   
312-348 2   7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358   2008-06-17   
312-348 3   7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358   2008-06-17   
312-348 4   7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358   2008-06-17   
312-348 5   7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358   2008-06-17   
312-348 6   7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358   2008-06-17   
312-348 7   7196 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL 358   2008-06-17   
312-348 8   224C ONVOY, LLC 358   2004-01-05   
312-348 9   5562 METROPCS, INC. 358   2009-05-22   
312-358 A ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
312-358 0   6529 T-MOBILE USA, INC. 358   2015-09-18   
312-358 1   6529 T-MOBILE USA, INC. 358   2015-09-18   
312-358 2   6529 T-MOBILE USA, INC. 358   2015-09-18   
312-358 3   6529 T-MOBILE USA, INC. 358   2015-09-18   
312-358 4   6529 T-MOBILE USA, INC. 358   2015-09-18   
312-358 5   6529 T-MOBILE USA, INC. 358   2015-09-18   
312-358 6   6529 T-MOBILE USA, INC. 358   2015-09-18   
312-358 7   6529 T-MOBILE USA, INC. 358   2015-09-18   
312-358 8   6529 T-MOBILE USA, INC. 358   2015-09-18   
312-358 9   6529 T-MOBILE USA, INC. 358   2015-09-18   
312-366 A BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-366 0   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2016-05-16   
312-366 1   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2016-05-16   
312-366 2   318J COMCAST IP PHONE, LLC 358   2016-04-12   
312-366 3   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2016-04-16   
312-366 4   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2016-05-16   
312-366 5   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2016-05-16   
312-366 6   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2016-04-03   
312-366 7   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2016-04-03   
312-366 8   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2016-04-03   
312-366 9   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2016-04-03   
312-371 A ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
312-371 0   6529 T-MOBILE USA, INC. 358      
312-371 1   6529 T-MOBILE USA, INC. 358      
312-371 2   6529 T-MOBILE USA, INC. 358      
312-371 3   6529 T-MOBILE USA, INC. 358      
312-371 4   6529 T-MOBILE USA, INC. 358      
312-371 5   6529 T-MOBILE USA, INC. 358      
312-371 6   6529 T-MOBILE USA, INC. 358      
312-371 7   6529 T-MOBILE USA, INC. 358      
312-371 8   6529 T-MOBILE USA, INC. 358      
312-371 9   6529 T-MOBILE USA, INC. 358      
312-373 A CHCGILGMDS7  6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-373 0   984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-04   
312-373 1   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-373 2   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-373 3   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-373 4   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-373 5   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-373 6   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-373 7   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-373 8   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-373 9   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358      
312-376 A CHCGIL24DS6  224C ONVOY, LLC 358      
312-376 0   224C ONVOY, LLC 358   2004-08-01   
312-376 1   224C ONVOY, LLC 358   2004-08-01   
312-376 2   224C ONVOY, LLC 358   2004-08-01   
312-376 3   224C ONVOY, LLC 358   2004-08-01   
312-376 4   224C ONVOY, LLC 358   2004-08-01   
312-376 5   5562 METROPCS, INC. 358   2004-09-06   
312-376 6   5562 METROPCS, INC. 358   2004-09-06   
312-376 7   5562 METROPCS, INC. 358   2004-09-06   
312-376 8   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2004-09-02   
312-376 9   5562 METROPCS, INC. 358   2004-09-06   
312-377 A BNSVILDGDS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-378 A LBRDILGOAMD  6630 USA MOBILITY WIRELESS, INC. 358      
312-379 A CHCGILWBXWZ  829J PAETEC ITEL, LLC 358   2024-12-09   
312-379 0   829J PAETEC ITEL, LLC 358      
312-379 1   9329 ILLINOIS BELL TEL CO 358   2002-06-03   
312-379 2   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358      
312-379 3   460K FIRST COMMUNICATIONS, LLC 358   2005-02-24   
312-379 4   9329 ILLINOIS BELL TEL CO 358   2000-05-05   
312-379 5   829J PAETEC ITEL, LLC 358      
312-379 6   9329 ILLINOIS BELL TEL CO 358   2000-05-05   
312-379 7   9329 ILLINOIS BELL TEL CO 358   2000-05-05   
312-379 8   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2006-12-09   
312-379 9   984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-02-25   
312-383 A CHCGILCGDS1  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-383 0   5562 METROPCS, INC. 358   2016-03-09   
312-383 1   5562 METROPCS, INC. 358   2016-03-09   
312-383 2   5562 METROPCS, INC. 358   2016-03-09   
312-383 3   5562 METROPCS, INC. 358   2016-03-09   
312-383 4   5562 METROPCS, INC. 358   2016-03-09   
312-383 5   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2016-03-02   
312-383 6   7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358   2016-03-02   
312-383 7   6529 T-MOBILE USA, INC. 358   2016-04-09   
312-383 8   6529 T-MOBILE USA, INC. 358   2016-04-09   

<< 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 >>

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.