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: HSTSTXJV6MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
346-204 A Houston TX 508J CENTURYLINK COMMUNICATIONS, LLC 560      
346-205 A Langham Creek TX 508J CENTURYLINK COMMUNICATIONS, LLC 560      
346-209 A Liverpool TX 508J CENTURYLINK COMMUNICATIONS, LLC 560      
346-702 A Richmond-Rosenberg TX 508J CENTURYLINK COMMUNICATIONS, LLC 560      
346-707 A Valley Lodge TX 508J CENTURYLINK COMMUNICATIONS, LLC 560      
346-908 A Smithers Lake TX 508J CENTURYLINK COMMUNICATIONS, LLC 560      
409-220 A Galveston TX 508J CENTURYLINK COMMUNICATIONS, LLC 560      
713-766 A Houston TX 508J CENTURYLINK COMMUNICATIONS, LLC 560      
936-235 A Conroe TX 508J CENTURYLINK COMMUNICATIONS, LLC 560      
936-251 A Prairie View TX 508J CENTURYLINK COMMUNICATIONS, LLC 560      
936-256 A Liberty TX 508J CENTURYLINK COMMUNICATIONS, LLC 560      
936-259 A Groveton TX 508J CENTURYLINK COMMUNICATIONS, LLC 560      
936-301 A Timpson TX 508J CENTURYLINK COMMUNICATIONS, LLC 560      
936-302 A Garrison TX 508J CENTURYLINK COMMUNICATIONS, LLC 560      
936-978 A Batson TX 508J CENTURYLINK COMMUNICATIONS, LLC 560      

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

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