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: 540

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
512-540 A Lampasas TX AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558      
512-540 0 Lampasas TX AUSUTX78AMD  6506 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX 558   2009-06-01   
512-540 1 Lampasas TX AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558      
512-540 2 Lampasas TX AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2009-07-22   
512-540 3 Lampasas TX AUSTTXGR03Z  903C ONVOY, LLC - TX 558   2011-11-02   
512-540 4 Lampasas TX AUSYTXFC0MD  004F BANDWIDTH.COM CLEC, LLC - TX 558   2012-10-10   
512-540 5 Lampasas TX AUSYTXFC1MD  004F BANDWIDTH.COM CLEC, LLC - TX 558   2010-06-24   
512-540 6 Lampasas TX AUSUTXNIGT3  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 558   2012-02-18   
512-540 7 Lampasas TX AUSTTXGR09Z  7138 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 558   2010-06-01   
512-540 8 Lampasas TX AUSYTXFC0MD  004F BANDWIDTH.COM CLEC, LLC - TX 558   2012-06-04   
512-540 9 Lampasas TX AUSTTX92X0X  139F WORLDCALL INTERCONNECT INC. 558   2008-12-13   

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.