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
312-983 0 Chicago Zone 01-Wabash IL   6664 SPRINT SPECTRUM L.P. 358   2011-01-05   
312-983 1 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358      
312-983 2 Chicago Zone 01-Wabash IL   6664 SPRINT SPECTRUM L.P. 358   2011-01-05   
312-983 3 Chicago Zone 01-Wabash IL   7056 XO ILLINOIS, INC. 358   2011-01-30   
312-983 4 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358      
312-983 5 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358      
312-983 6 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358      
312-983 7 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358      
312-983 8 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358      
312-983 9 Chicago Zone 01-Wabash IL   9329 AMERITECH ILLINOIS 358      
312-984 A Chicago Zone 01-Franklin IL CHCGILFRDS0  9329 AMERITECH ILLINOIS 358      
312-985 A Chicago Zone 01-Canal IL CHCGILWUDS0  7765 OVATION COMMUNICATIONS OF ILLINOIS, INC. 358      
312-985 0 Chicago Zone 01-Canal IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2007-11-08   
312-985 1 Chicago Zone 01-Canal IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2011-03-26   
312-985 2 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358   2000-07-07   
312-985 3 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358   2000-07-07   
312-985 4 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358   2000-07-07   
312-985 5 Chicago Zone 01-Canal IL   7765 OVATION COMMUNICATIONS OF ILLINOIS, INC. 358      
312-985 6 Chicago Zone 01-Canal IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2010-03-04   
312-985 7 Chicago Zone 01-Canal IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2007-11-08   
312-985 8 Chicago Zone 01-Canal IL   9329 AMERITECH ILLINOIS 358   2000-05-05   
312-985 9 Chicago Zone 01-Canal IL   6115 LEVEL 3 COMMUNICATIONS, LLC - IL 358   2011-03-26   
312-986 A Chicago Zone 01-Wabash IL CHCGILWBDS3  9329 AMERITECH ILLINOIS 358      
312-987 A Chicago Zone 01-Wabash IL CHCGILWBDS2  9329 AMERITECH ILLINOIS 358      
312-988 A Chicago Zone 01-Superior IL CHCGILSUDS2  9329 AMERITECH ILLINOIS 358      
312-988 0 Chicago Zone 01-Superior IL   7607 COMCAST PHONE OF ILLINOIS, LLC DBA COMCO - IL 358   2012-12-31   
312-988 1 Chicago Zone 01-Superior IL   9329 AMERITECH ILLINOIS 358      
312-988 2 Chicago Zone 01-Superior IL   9329 AMERITECH ILLINOIS 358      
312-988 3 Chicago Zone 01-Superior IL   9329 AMERITECH ILLINOIS 358      
312-988 4 Chicago Zone 01-Superior IL   9329 AMERITECH ILLINOIS 358      
312-988 5 Chicago Zone 01-Superior IL   9329 AMERITECH ILLINOIS 358      
312-988 6 Chicago Zone 01-Superior IL   9329 AMERITECH ILLINOIS 358      
312-988 7 Chicago Zone 01-Superior IL   9329 AMERITECH ILLINOIS 358      
312-988 8 Chicago Zone 01-Superior IL   9329 AMERITECH ILLINOIS 358      
312-988 9 Chicago Zone 01-Superior IL   9329 AMERITECH ILLINOIS 358      
312-989 A Chicago Zone 01-Calumet IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-989 0 Chicago Zone 01-Calumet IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2016-04-13   
312-989 1 Chicago Zone 01-Calumet IL   4604 FIRST COMMUNICATIONS LLC - IL 358   2016-04-06   
312-989 2 Chicago Zone 01-Calumet IL   6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358   2016-05-09   
312-989 3 Chicago Zone 01-Calumet IL   7607 COMCAST PHONE OF ILLINOIS, LLC DBA COMCO - IL 358   2015-07-30   
312-989 4 Chicago Zone 01-Calumet IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2015-07-25   
312-989 5 Chicago Zone 01-Calumet IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2015-07-25   
312-989 6 Chicago Zone 01-Calumet IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2015-07-25   
312-989 7 Chicago Zone 01-Calumet IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2015-07-25   
312-989 8 Chicago Zone 01-Calumet IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2015-07-25   
312-989 9 Chicago Zone 01-Calumet IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358   2015-07-25   
312-990 A Hinsdale IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-991 A Wheeling IL SCBGILRRGT1  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-992 A Chicago Zone 01-Franklin IL CHCGILFRDS1  9329 AMERITECH ILLINOIS 358      
312-993 A Chicago Zone 01-Canal IL CHCGILCLDS0  9329 AMERITECH ILLINOIS 358      

<< 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: LES.NET

Like this site? We accept donations via PayPal.