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: HSTNTXGIDS4

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
281-657 A Houston TX 8413 ALLEGIANCE TELECOM, INC. - TX 560      
281-720 A Satsuma TX 8413 ALLEGIANCE TELECOM, INC. - TX 560      
713-490 A Houston TX 8413 ALLEGIANCE TELECOM, INC. - TX 560      
832-327 A Houston Suburban TX 8413 ALLEGIANCE TELECOM, INC. - TX 560      
832-369 A Houston TX 8413 ALLEGIANCE TELECOM, INC. - TX 560      
832-436 A Bammel TX 8413 ALLEGIANCE TELECOM, INC. - TX 560      

Last updated: Sat, 11 Jul 2020 20:37:26 UTC

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