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.

OCN: 763H IP GLOBAL NETWORKS - TX

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
346-220 8 Spring TX HSTNTX08X0X  560   2016-04-16   
346-239 5 Richmond-Rosenberg TX HSTNTX08X0X  560   2016-04-16   
346-252 0 Houston Suburban TX HSTNTX08X0X  560   2016-04-16   
346-294 A Houston TX HSTNTX08X0X  560      
346-294 0 Houston TX HSTNTX08X0X  560   2018-03-10   
346-294 1 Houston TX HSTNTX08X0X  560   2018-03-10   
346-404 A Houston TX HSTNTX08X0X  560      
346-404 0 Houston TX HSTNTX08X0X  560   2016-04-16   
713-814 7 Houston TX HSTNTX08X0X  560   2017-11-13   
737-249 A Austin TX AUSTTXGR36Z  558      
737-249 1 Austin TX AUSTTXGR36Z  558   2018-11-23   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

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