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.
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Switch: WSBKTXWBRS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
325-644 A Westbrook TX 9533 SOUTHWESTERN BELL 550      
325-644 1 Westbrook TX 9533 SOUTHWESTERN BELL 550      
325-644 5 Westbrook TX 9533 SOUTHWESTERN BELL 550      

Last updated: Sat, 02 May 2026 12:20:53 UTC

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