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
312-766 6 Chicago Zone 01-Calumet IL   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2016-12-08   
312-766 7 Chicago Zone 01-Calumet IL   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2016-12-08   
312-766 8 Chicago Zone 01-Calumet IL   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2016-12-08   
312-766 9 Chicago Zone 01-Calumet IL   063E PEERLESS NETWORK OF ILLINOIS, LLC - IL 358   2016-12-08   
312-767 A Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358      
312-767 0 Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2015-06-15   
312-767 1 Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2015-06-15   
312-767 2 Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2015-06-15   
312-767 3 Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2015-06-15   
312-767 4 Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2015-06-15   
312-767 5 Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2015-06-15   
312-767 6 Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2015-06-15   
312-767 7 Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2015-06-15   
312-767 8 Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2015-06-15   
312-767 9 Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2015-06-15   
312-768 A Chicago Zone 01-Canal IL CHCGILCLGMD  7421 AT&T LOCAL 358      
312-768 0 Chicago Zone 01-Canal IL   6664 SPRINT SPECTRUM L.P. 358   2011-02-24   
312-768 1 Chicago Zone 01-Canal IL   4717 PAETEC COMMUNICATIONS, INC. - IL 358   2009-04-16   
312-768 2 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358   2002-10-23   
312-768 3 Chicago Zone 01-Canal IL   6664 SPRINT SPECTRUM L.P. 358   2011-01-05   
312-768 4 Chicago Zone 01-Canal IL   5447 ACCESS ONE, INC. - IL 358   2007-09-22   
312-768 5 Chicago Zone 01-Canal IL   7421 AT&T LOCAL 358      
312-768 6 Chicago Zone 01-Canal IL   5447 ACCESS ONE, INC. - IL 358   2007-09-22   
312-768 7 Chicago Zone 01-Canal IL   4604 FIRST COMMUNICATIONS LLC - IL 358   2005-02-20   
312-768 8 Chicago Zone 01-Canal IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-04   
312-768 9 Chicago Zone 01-Canal IL   6664 SPRINT SPECTRUM L.P. 358   2011-05-26   
312-769 A Chicago Zone 01-Calumet IL HMNDINPRCM0  6795 INDIANA PAGING NTWK 358      
312-770 A Chicago Zone 01-Calumet IL CHCGILMODS1  9329 AMERITECH ILLINOIS 358      
312-770 0 Chicago Zone 01-Calumet IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-01-27   
312-770 1 Chicago Zone 01-Calumet IL   9329 AMERITECH ILLINOIS 358      
312-770 2 Chicago Zone 01-Calumet IL   9329 AMERITECH ILLINOIS 358      
312-770 3 Chicago Zone 01-Calumet IL   9329 AMERITECH ILLINOIS 358      
312-770 4 Chicago Zone 01-Calumet IL   9329 AMERITECH ILLINOIS 358      
312-770 5 Chicago Zone 01-Calumet IL   9329 AMERITECH ILLINOIS 358      
312-770 6 Chicago Zone 01-Calumet IL   9329 AMERITECH ILLINOIS 358      
312-770 7 Chicago Zone 01-Calumet IL   9329 AMERITECH ILLINOIS 358      
312-770 8 Chicago Zone 01-Calumet IL   9329 AMERITECH ILLINOIS 358      
312-770 9 Chicago Zone 01-Calumet IL   9329 AMERITECH ILLINOIS 358      
312-771 A Chicago Zone 01-Wabash IL ELGNIL32CM2  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-772 A Chicago Zone 01-Calumet IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-772 0 Chicago Zone 01-Calumet IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-01-06   
312-772 1 Chicago Zone 01-Calumet IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-01-06   
312-772 2 Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2009-09-06   
312-772 3 Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2009-09-06   
312-772 4 Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2009-09-06   
312-772 5 Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2009-09-06   
312-772 6 Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-04   
312-772 7 Chicago Zone 01-Calumet IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-01-06   
312-772 8 Chicago Zone 01-Calumet IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-01-06   
312-772 9 Chicago Zone 01-Calumet IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2009-01-06   

<< 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: Sun, 10 Nov 2019 13:49:34 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.