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: KLLNTXXARMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
254-276 A Irene TX 508J CENTURYLINK COMMUNICATIONS, LLC 556      
254-309 A Rosebud TX 508J CENTURYLINK COMMUNICATIONS, LLC 556      
254-312 A Killeen TX 508J CENTURYLINK COMMUNICATIONS, LLC 556      
254-321 A Burlington TX 508J CENTURYLINK COMMUNICATIONS, LLC 556      
254-332 A Whitney TX 508J CENTURYLINK COMMUNICATIONS, LLC 556      

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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