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: 224

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
956-224 A Roma TX HRLNTXHGX7X  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 568      
956-224 0 Roma TX   6534 NEW CINGULAR WIRELESS PCS, LLC - IL 568   2004-07-03   
956-224 1 Roma TX   4290 STPCS JOINT VENTURE, LLC 568   2009-03-06   
956-224 2 Roma TX   4290 STPCS JOINT VENTURE, LLC 568   2009-03-06   
956-224 3 Roma TX   4290 STPCS JOINT VENTURE, LLC 568   2009-06-13   
956-224 4 Roma TX   4290 STPCS JOINT VENTURE, LLC 568   2009-06-20   
956-224 5 Roma TX   4290 STPCS JOINT VENTURE, LLC 568   2010-03-09   
956-224 6 Roma TX   4290 STPCS JOINT VENTURE, LLC 568   2009-05-09   
956-224 7 Roma TX   4290 STPCS JOINT VENTURE, LLC 568   2009-05-09   
956-224 8 Roma TX   004F BANDWIDTH.COM CLEC, LLC - TX 568   2010-10-02   
956-224 9 Roma TX   004F BANDWIDTH.COM CLEC, LLC - TX 568   2010-06-24   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.