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: 9558 INTRADO COMMUNICATIONS, LLC

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
346-415 7 Houston Suburban TX   560   2026-11-12   
346-981 7 Houston TX   560   2026-11-16   
512-747 0 Austin TX   558   2026-10-28   
682-506 1 Fort Worth TX   552   2026-10-16   
726-271 7 San Antonio TX   566   2026-10-12   
915-777 A El Paso TX ELPSTXMAX7Y  540      
945-424 9 Grand Prairie TX   552   2026-11-11   

Last updated: Tue, 29 Sep 2026 03:00:13 UTC

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