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: 512 [Rate centres in NPA 512] [Dial plan for NPA 512]

NXX: 840

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
512-840 A Austin TX SMRCTXXAKMD  508J CENTURYLINK COMMUNICATIONS, LLC 558      
512-840 0 Austin TX AUSTTXGR25Z  516C AT&T CORP. 558   2014-10-13   
512-840 1 Austin TX AUSTTXGR25Z  516C AT&T CORP. 558   2014-10-13   
512-840 2 Austin TX AUSTTXGR09Z  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 558   2014-10-13   
512-840 3 Austin TX AUSTTXGR09Z  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 558   2014-10-13   
512-840 4 Austin TX AUSTTXGR09Z  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 558   2014-10-13   
512-840 5 Austin TX AUSTTXGR09Z  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 558   2014-10-13   
512-840 6 Austin TX AUSTTXGR09Z  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 558   2014-10-13   
512-840 7 Austin TX SMRCTXXAKMD  508J CENTURYLINK COMMUNICATIONS, LLC 558   2014-10-10   
512-840 8 Austin TX AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2014-10-13   
512-840 9 Austin TX AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2014-10-13   

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.