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: 541J SIMWOOD, INC.

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
210-329 A San Antonio TX SNANTXCA97Z  566   2021-11-07   
210-329 9 San Antonio TX SNANTXCA97Z  566   2021-11-07   
346-509 A Houston TX HSTNTXJAXOY  560   2021-11-07   
346-509 9 Houston TX HSTNTXJAXOY  560   2021-11-07   
737-304 A Austin TX AUSTTXGR66Z  558   2021-11-13   
737-304 9 Austin TX AUSTTXGR66Z  558   2021-11-13   
945-221 A Dallas TX DLLSTX97XFX  552   2021-11-07   
945-221 9 Dallas TX DLLSTX97XFX  552   2021-11-07   

Last updated: Fri, 13 May 2022 22:16:13 UTC

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