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.

Buchanan Dam, TX

<< 1 2

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
737-372 6 AUSTTXGR03Z  903C ONVOY, LLC - TX 558   2021-03-14   
737-372 7 AUSTTXGR03Z  903C ONVOY, LLC - TX 558   2020-11-16   
737-372 8 AUSTTXGR03Z  903C ONVOY, LLC - TX 558   2021-04-30   
737-372 9 AUSTTXGR55Z  516J TON80 COMMUNICATIONS, LLC 558   2021-06-20   

<< 1 2

Last updated: Thu, 05 Feb 2026 23:41:55 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.