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
312-479 6 Chicago Zone 01-Canal IL   6529 T-MOBILE USA, INC. 358   2004-09-24   
312-479 7 Chicago Zone 01-Canal IL   6529 T-MOBILE USA, INC. 358   2004-09-24   
312-479 8 Chicago Zone 01-Canal IL   6529 T-MOBILE USA, INC. 358   2004-09-24   
312-479 9 Chicago Zone 01-Canal IL   7421 AT&T LOCAL 358      
312-480 A Chicago Zone 01-Wabash IL BURGILAHGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-480 0 Chicago Zone 01-Wabash IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-480 1 Chicago Zone 01-Wabash IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-480 2 Chicago Zone 01-Wabash IL   7056 XO ILLINOIS, INC. 358   2010-10-27   
312-480 3 Chicago Zone 01-Wabash IL   7056 XO ILLINOIS, INC. 358   2010-10-27   
312-480 4 Chicago Zone 01-Wabash IL   7056 XO ILLINOIS, INC. 358   2010-10-27   
312-480 5 Chicago Zone 01-Wabash IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-480 6 Chicago Zone 01-Wabash IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-480 7 Chicago Zone 01-Wabash IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-480 8 Chicago Zone 01-Wabash IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-480 9 Chicago Zone 01-Wabash IL   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 358      
312-481 A Chicago Zone 01-Calumet IL   5562 METRO PCS, INC. 358   2017-08-28   
312-481 0 Chicago Zone 01-Calumet IL   5562 METRO PCS, INC. 358   2017-08-28   
312-481 1 Chicago Zone 01-Calumet IL   5562 METRO PCS, INC. 358   2017-08-28   
312-481 2 Chicago Zone 01-Calumet IL   5562 METRO PCS, INC. 358   2017-08-28   
312-481 3 Chicago Zone 01-Calumet IL   5562 METRO PCS, INC. 358   2017-08-28   
312-481 4 Chicago Zone 01-Calumet IL   5562 METRO PCS, INC. 358   2017-08-29   
312-481 5 Chicago Zone 01-Calumet IL   5562 METRO PCS, INC. 358   2017-08-29   
312-481 6 Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2018-07-26   
312-481 7 Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2018-07-26   
312-481 8 Chicago Zone 01-Calumet IL   984E BANDWIDTH.COM CLEC, LLC - IL 358   2018-07-26   
312-481 9 Chicago Zone 01-Calumet IL   5562 METRO PCS, INC. 358   2017-08-28   
312-482 A Chicago Zone 01-Superior IL CHCGILSUDS2  9329 AMERITECH ILLINOIS 358      
312-483 A Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358      
312-483 0 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2014-10-10   
312-483 1 Chicago Zone 01-Calumet IL   7765 OVATION COMMUNICATIONS OF ILLINOIS, INC. 358   2014-10-08   
312-483 2 Chicago Zone 01-Calumet IL   7765 OVATION COMMUNICATIONS OF ILLINOIS, INC. 358   2014-10-08   
312-483 3 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2014-10-06   
312-483 4 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2014-10-06   
312-483 5 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2014-10-06   
312-483 6 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2014-10-06   
312-483 7 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2014-10-06   
312-483 8 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2014-10-06   
312-483 9 Chicago Zone 01-Calumet IL   6529 T-MOBILE USA, INC. 358   2014-10-06   
312-484 A Chicago Zone 01-Wabash IL BURGILAJCM1  6630 USA MOBILITY WIRELESS, INC. 358      
312-485 A Chicago Zone 01-Wabash IL ELGNIL32CM2  6333 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 358      
312-486 A Chicago Zone 01-Calumet IL EGVGILIFDS1  7196 MCI WORLDCOM COMMUNICATIONS, INC. - IL 358      
312-486 0 Chicago Zone 01-Calumet IL   7196 MCI WORLDCOM COMMUNICATIONS, INC. - IL 358   2004-06-17   
312-486 1 Chicago Zone 01-Calumet IL   7196 MCI WORLDCOM COMMUNICATIONS, INC. - IL 358   2004-06-17   
312-486 2 Chicago Zone 01-Calumet IL   7196 MCI WORLDCOM COMMUNICATIONS, INC. - IL 358   2004-06-17   
312-486 3 Chicago Zone 01-Calumet IL   7196 MCI WORLDCOM COMMUNICATIONS, INC. - IL 358   2004-06-17   
312-486 4 Chicago Zone 01-Calumet IL   7196 MCI WORLDCOM COMMUNICATIONS, INC. - IL 358   2004-06-17   
312-486 5 Chicago Zone 01-Calumet IL   7196 MCI WORLDCOM COMMUNICATIONS, INC. - IL 358   2004-06-17   
312-486 6 Chicago Zone 01-Calumet IL   7196 MCI WORLDCOM COMMUNICATIONS, INC. - IL 358   2004-06-17   
312-486 7 Chicago Zone 01-Calumet IL   7196 MCI WORLDCOM COMMUNICATIONS, INC. - IL 358   2004-06-17   
312-486 8 Chicago Zone 01-Calumet IL   7196 MCI WORLDCOM COMMUNICATIONS, INC. - IL 358   2004-06-17   

<< 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: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.