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.

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

<< 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 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 >>

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
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   7765 OVATION COMMUNICATIONS OF ILLINOIS, INC. 358   2019-07-20   
312-668 5 Chicago Zone 01-Calumet IL   7765 OVATION COMMUNICATIONS OF ILLINOIS, INC. 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 AMERITECH ILLINOIS 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 AMERITECH ILLINOIS 358      
312-669 2 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-669 3 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-669 4 Chicago Zone 01-Canal IL   6664 SPRINT SPECTRUM L.P. 358   2011-01-05   
312-669 5 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-669 6 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-669 7 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-669 8 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-669 9 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-670 A Chicago Zone 01-Illinois Dearborn IL CHCGILIDDS2  9329 AMERITECH ILLINOIS 358      
312-671 A Chicago Zone 01-Calumet IL   6664 SPRINT SPECTRUM L.P. 358      
312-672 A Chicago Zone 01-Canal IL CHCGILCLDS3  9329 AMERITECH ILLINOIS 358      
312-672 0 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-672 1 Chicago Zone 01-Canal IL   6664 SPRINT SPECTRUM L.P. 358   2011-05-26   
312-672 2 Chicago Zone 01-Canal IL   6664 SPRINT SPECTRUM L.P. 358   2007-10-10   
312-672 3 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-672 4 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-672 5 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-672 6 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-672 7 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-672 8 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358      
312-672 9 Chicago Zone 01-Canal IL   6664 SPRINT SPECTRUM L.P. 358   2007-10-10   
312-673 A Chicago Zone 01-Calumet IL CHCGIL24DS3  4604 FIRST COMMUNICATIONS LLC - IL 358      
312-674 A Chicago Zone 01-Calumet IL CHCGILCADS0  9329 AMERITECH ILLINOIS 358      
312-674 0 Chicago Zone 01-Calumet IL   9329 AMERITECH ILLINOIS 358      
312-674 1 Chicago Zone 01-Calumet IL   9329 AMERITECH ILLINOIS 358      
312-674 2 Chicago Zone 01-Calumet IL   9329 AMERITECH ILLINOIS 358      
312-674 3 Chicago Zone 01-Calumet IL   9329 AMERITECH ILLINOIS 358      
312-674 4 Chicago Zone 01-Calumet IL   9329 AMERITECH ILLINOIS 358      
312-674 5 Chicago Zone 01-Calumet IL   9329 AMERITECH ILLINOIS 358      
312-674 6 Chicago Zone 01-Calumet IL   7721 BROADWING COMMUNICATIONS, LLC - IL 358   2002-06-24   
312-674 7 Chicago Zone 01-Calumet IL   7056 XO ILLINOIS, INC. 358   2011-01-05   
312-674 8 Chicago Zone 01-Calumet IL   9329 AMERITECH ILLINOIS 358      
312-674 9 Chicago Zone 01-Calumet IL   9329 AMERITECH ILLINOIS 358      
312-675 A Chicago Zone 01-Wabash IL CHCGILWBDS2  9329 AMERITECH ILLINOIS 358      
312-675 0 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358      
312-675 1 Chicago Zone 01-Wabash IL   6664 SPRINT SPECTRUM L.P. 358   2011-05-26   
312-675 2 Chicago Zone 01-Wabash IL   259E YMAX COMMUNICATIONS CORP. - IL 358   2009-08-21   
312-675 3 Chicago Zone 01-Wabash IL   7721 BROADWING 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   

<< 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 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 >>

Last updated: Tue, 31 Dec 2019 02:37:20 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.