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.

Arroyo Grande, CA

<< 1 2 3 4

NPA-NXX BLOCK Switch OCN LATA LIR Eff date Disc date
820-346 7 SNLOCA01XFX  649C ONVOY, LLC - CA 740   2021-08-13   
820-346 8 SNLOCA01XYX  6529 T-MOBILE USA, INC. 740   2021-02-27   
820-346 9 SNLOCA01XYX  6529 T-MOBILE USA, INC. 740   2021-02-27   

<< 1 2 3 4

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

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.