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: 866

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
956-866 A Brownsville TX HRLNTXHGXNX  965H FRACTEL, LLC 568      
956-866 0 Brownsville TX HRLNTXKX8MD  4290 STPCS JOINT VENTURE, LLC 568   2022-02-13   
956-866 1 Brownsville TX HRLNTXHGXKX  624H ONVOY SPECTRUM, LLC 568   2021-11-13   
956-866 2 Brownsville TX SNANTXCA88Z  516J TON80 COMMUNICATIONS, LLC 568   2021-06-25   
956-866 3 Brownsville TX HRLNTXHGXKX  624H ONVOY SPECTRUM, LLC 568   2021-11-13   
956-866 4 Brownsville TX HRLNTXHGXKX  624H ONVOY SPECTRUM, LLC 568   2021-11-13   
956-866 5 Brownsville TX HRLNTXHGXKX  624H ONVOY SPECTRUM, LLC 568   2021-06-24   
956-866 6 Brownsville TX HRLNTXHGXNX  965H FRACTEL, LLC 568   2021-03-15   
956-866 7 Brownsville TX HRLNTXKX8MD  4290 STPCS JOINT VENTURE, LLC 568   2022-07-25   
956-866 8 Brownsville TX HRLNTXATTMD  7148 TELEPORT COMMUNICATIONS AMERICA, LLC - TX 568   2021-03-16   
956-866 9 Brownsville TX HRLNTXKX8MD  4290 STPCS JOINT VENTURE, LLC 568   2022-02-13   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.