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: 257

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
956-257 A Rio Grande City TX HRLNTXHGX7X  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 568      
956-257 0 Rio Grande City TX HRLNTXHGX7X  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 568      
956-257 1 Rio Grande City TX HRLNTXHGX7X  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 568      
956-257 2 Rio Grande City TX HRLNTXKX7MD  5562 METROPCS, INC. 568      
956-257 3 Rio Grande City TX HRLNTXKX7MD  5562 METROPCS, INC. 568      
956-257 4 Rio Grande City TX HRLNTXKX7MD  5562 METROPCS, INC. 568      
956-257 5 Rio Grande City TX HRLNTXHGX7X  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 568      
956-257 6 Rio Grande City TX HRLNTXHGX7X  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 568      
956-257 7 Rio Grande City TX HRLNTXHGX7X  6534 NEW CINGULAR WIRELESS PCS, LLC - IL 568      
956-257 8 Rio Grande City TX HRLNTXKX7MD  5562 METROPCS, INC. 568      
956-257 9 Rio Grande City TX HRLNTXHGMMD  004F BANDWIDTH.COM CLEC, LLC - TX 568      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.