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: SNANTXMADS0

Remotes:

Switch Switch name Switch type
SNANTXHERS2  SAN ANTONIO HELOTES  DRL 
SNANTXICRS2  SAN ANTONIO INDIAN CREEK  DRL 
SNANTXSHRS0  SAN ANTONIO ST HEDWIG  RSC 
SNANTXSORS2  SAN ANTONIO SOUTHTON  DRL 
SNANTXTHRS0  SAN ANTONIO THELMA  DRL 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
210-310 A San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-661 A San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-662 A San Antonio TX 9533 SOUTHWESTERN BELL 566      
210-666 A San Antonio TX 9533 SOUTHWESTERN BELL 566      

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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