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: 956 [Rate centres in NPA 956] [Dial plan for NPA 956]

NXX: 517

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
956-517 A Brownsville TX HRLNTXKX8MD  4290 STPCS JOINT VENTURE, LLC 568      
956-517 0 Brownsville TX HRLNTXKX8MD  4290 STPCS JOINT VENTURE, LLC 568   2009-10-22   
956-517 1 Brownsville TX MCALTX930MD  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 568   2008-07-25   
956-517 2 Brownsville TX MCALTX930MD  6114 LEVEL 3 COMMUNICATIONS, LLC - TX 568   2008-07-25   
956-517 3 Brownsville TX HRLNTXHGX7X  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 568   2008-10-04   
956-517 4 Brownsville TX HRLNTXHGX7X  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 568   2008-10-04   
956-517 5 Brownsville TX HRLNTXHGX7X  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 568   2008-10-04   
956-517 6 Brownsville TX HRLNTXHGX7X  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 568   2008-11-02   
956-517 7 Brownsville TX HRLNTXHGX7X  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 568   2008-11-02   
956-517 8 Brownsville TX HRLNTXKX8MD  5562 METROPCS, INC. 568   2009-04-16   
956-517 9 Brownsville TX HRLNTXKX8MD  4290 STPCS JOINT VENTURE, LLC 568   2007-05-25   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.