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: CYPRTXCYDS1

Remotes:

Switch Switch name Switch type
HMPSTXHMRS0  HEMPSTEAD  EXM 
WLLRTXWLRS2  WALLER  EXM 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
281-213 A Cypress EMS TX 9533 SOUTHWESTERN BELL 560      
281-256 A Cypress TX 9533 SOUTHWESTERN BELL 560      
281-304 A Cypress EMS TX 9533 SOUTHWESTERN BELL 560      
281-373 A Cypress EMS TX 9533 SOUTHWESTERN BELL 560      
281-758 A Cypress TX 9533 SOUTHWESTERN BELL 560      
832-773 A Cypress TX 9533 SOUTHWESTERN BELL 560      

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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