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: 737 [Rate centres in NPA 737] [Dial plan for NPA 737]

NXX: 666

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
737-666 A Elgin TX AUSTTXGRDS3  319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 558      
737-666 0 Elgin TX AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2015-02-20   
737-666 1 Elgin TX AUSTTX92SMD  7551 AUSTIN BESTLINE COMPANY 558   2014-05-21   
737-666 2 Elgin TX AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2015-08-06   
737-666 3 Elgin TX AUSTTXGRX3Y  073H TELNYX LLC 558   2017-03-22   
737-666 4 Elgin TX AUSTTXGR03Z  903C ONVOY, LLC - TX 558   2017-06-30   
737-666 5 Elgin TX AUSUTX78AMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2014-07-01   
737-666 6 Elgin TX AUSTTXGRDS3  319D FOREMOST TELECOMMUNICATIONS CORPORATION - TX 558   2013-07-01   
737-666 7 Elgin TX SMRCTXXAKMD  508J CENTURYLINK COMMUNICATIONS, LLC 558   2014-04-10   
737-666 8 Elgin TX AUSYTXFC0MD  004F BANDWIDTH.COM CLEC, LLC - TX 558   2014-04-25   
737-666 9 Elgin TX AUSTTXGRDS6  177F PEERLESS NETWORK OF TEXAS, LLC - TX 558   2013-10-19   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.