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NPA: 312 [Rate centres in NPA 312] [Dial plan for NPA 312]

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
312-663 A Chicago Zone 01-Wabash IL CHCGILWBDS3  9329 ILLINOIS BELL TEL CO 358      
312-664 A Chicago Zone 01-Superior IL CHCGILSUDS2  9329 ILLINOIS BELL TEL CO 358      
312-665 A Chicago Zone 01-Wabash IL CHCGIL24DS0  7136 TELEPORT COMMUNICATIONS AMERICA, LLC - IL 358      
312-666 A Chicago Zone 01-Monroe IL CHCGILMODS1  9329 ILLINOIS BELL TEL CO 358      
312-667 A Chicago Zone 01-Calumet IL CHCGILWUDS4  063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358      
312-667 0 Chicago Zone 01-Calumet IL   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2012-10-22   
312-667 1 Chicago Zone 01-Calumet IL   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2012-10-22   
312-667 2 Chicago Zone 01-Calumet IL   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2012-10-22   
312-667 3 Chicago Zone 01-Calumet IL   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2012-10-22   
312-667 4 Chicago Zone 01-Calumet IL   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2012-10-22   
312-667 5 Chicago Zone 01-Calumet IL   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2012-10-22   
312-667 6 Chicago Zone 01-Calumet IL   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2012-10-22   
312-667 7 Chicago Zone 01-Calumet IL   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2012-10-22   
312-667 8 Chicago Zone 01-Calumet IL   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2012-10-22   
312-667 9 Chicago Zone 01-Calumet IL   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2012-10-22   
312-668 A Chicago Zone 01-Calumet IL CHCGIL24X0X  425J CSC WIRELESS, LLC 358      
312-668 0 Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2019-10-04   
312-668 1 Chicago Zone 01-Calumet IL   138G LEVEL 3 TELECOM OF ILLINOIS, LLC - IL 358   2019-09-16   
312-668 2 Chicago Zone 01-Calumet IL   425J CSC WIRELESS, LLC 358   2019-07-19   
312-668 3 Chicago Zone 01-Calumet IL   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2019-09-14   
312-668 4 Chicago Zone 01-Calumet IL   829J PAETEC ITEL, LLC 358   2019-07-20   
312-668 5 Chicago Zone 01-Calumet IL   829J PAETEC ITEL, LLC 358   2019-07-20   
312-668 6 Chicago Zone 01-Calumet IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2019-08-18   
312-668 7 Chicago Zone 01-Calumet IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2019-08-18   
312-668 8 Chicago Zone 01-Calumet IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2019-08-18   
312-668 9 Chicago Zone 01-Calumet IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2019-08-18   
312-669 A Chicago Zone 01-Canal IL CHCGILCLDS3  9329 ILLINOIS BELL TEL CO 358      
312-669 0 Chicago Zone 01-Canal IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2015-02-07   
312-669 1 Chicago Zone 01-Canal IL   9329 ILLINOIS BELL TEL CO 358      
312-669 2 Chicago Zone 01-Canal IL   9329 ILLINOIS BELL TEL CO 358      
312-669 3 Chicago Zone 01-Canal IL   9329 ILLINOIS BELL TEL CO 358      
312-669 4 Chicago Zone 01-Canal IL   6529 T-MOBILE USA, INC. 358   2011-01-05   
312-669 5 Chicago Zone 01-Canal IL   9329 ILLINOIS BELL TEL CO 358      
312-669 6 Chicago Zone 01-Canal IL   9329 ILLINOIS BELL TEL CO 358      
312-669 7 Chicago Zone 01-Canal IL   9329 ILLINOIS BELL TEL CO 358      
312-669 8 Chicago Zone 01-Canal IL   9329 ILLINOIS BELL TEL CO 358      
312-669 9 Chicago Zone 01-Canal IL   9329 ILLINOIS BELL TEL CO 358      
312-670 A Chicago Zone 01-Illinois Dearborn IL CHCGILIDDS2  9329 ILLINOIS BELL TEL CO 358      
312-671 A Chicago Zone 01-Calumet IL ELGNILOTGT5  5562 METROPCS, INC. 358      
312-671 0 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358      
312-671 1 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358      
312-671 2 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358      
312-671 3 Chicago Zone 01-Calumet IL   5562 METROPCS, INC. 358      
312-671 4 Chicago Zone 01-Calumet IL   5562 METROPCS, INC. 358      
312-671 5 Chicago Zone 01-Calumet IL   5562 METROPCS, INC. 358      
312-671 6 Chicago Zone 01-Calumet IL   5562 METROPCS, INC. 358      
312-671 7 Chicago Zone 01-Calumet IL   5562 METROPCS, INC. 358      
312-671 8 Chicago Zone 01-Calumet IL   5562 METROPCS, INC. 358      
312-671 9 Chicago Zone 01-Calumet IL   5562 METROPCS, INC. 358      
312-672 A Chicago Zone 01-Canal IL CHCGILCLDS3  9329 ILLINOIS BELL TEL CO 358      
312-672 0 Chicago Zone 01-Canal IL   9329 ILLINOIS BELL TEL CO 358      
312-672 1 Chicago Zone 01-Canal IL   6529 T-MOBILE USA, INC. 358   2011-05-26   
312-672 2 Chicago Zone 01-Canal IL   6529 T-MOBILE USA, INC. 358   2007-10-10   
312-672 3 Chicago Zone 01-Canal IL   9329 ILLINOIS BELL TEL CO 358      
312-672 4 Chicago Zone 01-Canal IL   9329 ILLINOIS BELL TEL CO 358      
312-672 5 Chicago Zone 01-Canal IL   9329 ILLINOIS BELL TEL CO 358      
312-672 6 Chicago Zone 01-Canal IL   9329 ILLINOIS BELL TEL CO 358      
312-672 7 Chicago Zone 01-Canal IL   9329 ILLINOIS BELL TEL CO 358      
312-672 8 Chicago Zone 01-Canal IL   9329 ILLINOIS BELL TEL CO 358      
312-672 9 Chicago Zone 01-Canal IL   6529 T-MOBILE USA, INC. 358   2007-10-10   
312-673 A Chicago Zone 01-Calumet IL CHCGILWUX6X  460K FIRST COMMUNICATIONS, LLC 358      
312-674 A Chicago Zone 01-Calumet IL CHCGILCADS0  9329 ILLINOIS BELL TEL CO 358      
312-674 0 Chicago Zone 01-Calumet IL   9329 ILLINOIS BELL TEL CO 358      
312-674 1 Chicago Zone 01-Calumet IL   624H ONVOY SPECTRUM, LLC 358   2022-01-07   
312-674 2 Chicago Zone 01-Calumet IL   9329 ILLINOIS BELL TEL CO 358      
312-674 3 Chicago Zone 01-Calumet IL   9329 ILLINOIS BELL TEL CO 358      
312-674 4 Chicago Zone 01-Calumet IL   9329 ILLINOIS BELL TEL CO 358      
312-674 5 Chicago Zone 01-Calumet IL   9329 ILLINOIS BELL TEL CO 358      
312-674 6 Chicago Zone 01-Calumet IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2002-06-24   
312-674 7 Chicago Zone 01-Calumet IL   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 358   2011-01-05   
312-674 8 Chicago Zone 01-Calumet IL   9329 ILLINOIS BELL TEL CO 358      
312-674 9 Chicago Zone 01-Calumet IL   9329 ILLINOIS BELL TEL CO 358      
312-675 A Chicago Zone 01-Wabash IL CHCGILWBDS2  9329 ILLINOIS BELL TEL CO 358      
312-675 0 Chicago Zone 01-Wabash IL   9329 ILLINOIS BELL TEL CO 358      
312-675 1 Chicago Zone 01-Wabash IL   6529 T-MOBILE USA, INC. 358   2011-05-26   
312-675 2 Chicago Zone 01-Wabash IL   224C ONVOY, LLC 358   2009-08-21   
312-675 3 Chicago Zone 01-Wabash IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2007-10-12   
312-675 4 Chicago Zone 01-Wabash IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2007-10-12   
312-675 5 Chicago Zone 01-Wabash IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2007-10-12   
312-675 6 Chicago Zone 01-Wabash IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2007-10-12   
312-675 7 Chicago Zone 01-Wabash IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2007-10-12   
312-675 8 Chicago Zone 01-Wabash IL   224C ONVOY, LLC 358   2009-08-21   
312-675 9 Chicago Zone 01-Wabash IL   6529 T-MOBILE USA, INC. 358   2011-05-26   
312-676 A Chicago Zone 01-Calumet IL CHCGILWUX6X  460K FIRST COMMUNICATIONS, LLC 358      
312-676 0 Chicago Zone 01-Calumet IL   460K FIRST COMMUNICATIONS, LLC 358   2006-08-07   
312-676 1 Chicago Zone 01-Calumet IL   460K FIRST COMMUNICATIONS, LLC 358   2006-08-07   
312-676 2 Chicago Zone 01-Calumet IL   460K FIRST COMMUNICATIONS, LLC 358   2006-08-07   
312-676 3 Chicago Zone 01-Calumet IL   460K FIRST COMMUNICATIONS, LLC 358   2006-08-07   
312-676 4 Chicago Zone 01-Calumet IL   460K FIRST COMMUNICATIONS, LLC 358   2006-08-07   
312-676 5 Chicago Zone 01-Calumet IL   460K FIRST COMMUNICATIONS, LLC 358   2006-08-07   
312-676 6 Chicago Zone 01-Calumet IL   460K FIRST COMMUNICATIONS, LLC 358   2006-08-07   
312-676 7 Chicago Zone 01-Calumet IL   460K FIRST COMMUNICATIONS, LLC 358   2006-08-07   
312-676 8 Chicago Zone 01-Calumet IL   460K FIRST COMMUNICATIONS, LLC 358   2006-08-07   
312-676 9 Chicago Zone 01-Calumet IL   460K FIRST COMMUNICATIONS, LLC 358   2006-08-07   
312-677 A Chicago Zone 01-Wabash IL LBRDILGOAMD  6630 USA MOBILITY WIRELESS, INC. 358      
312-678 A Chicago Zone 01-Calumet IL ELGNILOTGT5  6529 T-MOBILE USA, INC. 358      
312-678 0 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2013-09-24   
312-678 1 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2013-09-24   
312-678 2 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2013-09-24   
312-678 3 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2013-09-23   

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Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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