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: HSTNTXYAOMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
346-438 A Houston TX 515J IP HORIZON LLC 560      
346-515 6 Richmond-Rosenberg TX 515J IP HORIZON LLC 560      
346-536 0 Satsuma TX 515J IP HORIZON LLC 560      
346-576 1 Barker TX 515J IP HORIZON LLC 560      
346-640 0 Langham Creek TX 515J IP HORIZON LLC 560      
346-645 2 Tomball TX 515J IP HORIZON LLC 560      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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