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.


NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
214-764 A Dallas TX DLLSTX97DSA  552      
281-857 A Houston TX HSTQTX02CMD  560      
281-857 6 Houston TX   560   2005-05-08   
512-842 A Wimberley PPCP TX AUSTTXUH8MD  558      
512-842 0 Wimberley PPCP TX   558   2006-12-22   

Last updated: Mon, 24 May 2021 01:28:43 UTC

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