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: HSTNTXJAXSY

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
346-879 A Houston TX 700J WAVENATION, LLC 560   2025-09-12   
346-879 0 Houston TX 700J WAVENATION, LLC 560   2025-09-12   

Last updated: Sat, 01 Aug 2026 03:19:33 UTC

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