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.

Switch: SNANTX91DS5

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
210-955 8 San Antonio TX 4866 SMARTCOM TELEPHONE, LLC 566   2017-04-10   
830-254 2 Karnes City-Falls City TX 4866 SMARTCOM TELEPHONE, LLC 566   2011-12-23   
830-971 6 Eagle Pass TX 4866 SMARTCOM TELEPHONE, LLC 566   2018-02-02   
956-218 A Laredo TX 4866 SMARTCOM TELEPHONE, LLC 566      

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.