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: THDLTXXADS0

Remotes:

Switch Switch name Switch type
SNGBTXXARS0  SAN GABRIEL  RLC 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
512-898 A Thorndale-Thrall TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 558      
512-898 0 Thorndale-Thrall TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 558      
512-898 1 Thorndale-Thrall TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 558      
512-898 2 Thorndale-Thrall TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 558      
512-898 5 Thorndale-Thrall TX 4344 FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS 558      

Last updated: Sat, 04 Jul 2026 13:07:56 UTC

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