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: FTWOTXEDDS0

Remotes:

Switch Switch name Switch type
ALVDTXTIRS0  Alvarado  RSC 
ALVDTXTIRS1  ALVARADO  RSC 
CISCTXHIRS0  Cisco  RSC 
ESLDTXMARS0  Eastland  RSC 
GRDNTXMYRS0  Gordon  RSC 
RNGRTXMIRS0  Ranger  RSC 
STRWTXORRS0  Strawn  RSC 

<< 1 2

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
817-884 3 Fort Worth TX 9533 SOUTHWESTERN BELL 552      
817-884 4 Fort Worth TX 9533 SOUTHWESTERN BELL 552      
817-884 5 Fort Worth TX 9533 SOUTHWESTERN BELL 552      
817-884 8 Fort Worth TX 9533 SOUTHWESTERN BELL 552      
817-884 9 Fort Worth TX 9533 SOUTHWESTERN BELL 552      
817-900 4 Fort Worth TX 9533 SOUTHWESTERN BELL 552      
817-978 A Fort Worth TX 9533 SOUTHWESTERN BELL 552      

<< 1 2

Last updated: Thu, 05 Feb 2026 23:41:55 UTC

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