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.

NPA: 209 [Rate centres in NPA 209] [Dial plan for NPA 209]

NXX: 812

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
209-812 A Atwater CA SKTOCAOY6MD  6529 T-MOBILE USA, INC. 738      
209-812 0 Atwater CA   649C ONVOY, LLC - CA 738      
209-812 1 Atwater CA   649C ONVOY, LLC - CA 738      
209-812 2 Atwater CA   649C ONVOY, LLC - CA 738      
209-812 3 Atwater CA   649C ONVOY, LLC - CA 738      
209-812 4 Atwater CA   318J COMCAST IP PHONE, LLC 738   2010-09-03   
209-812 5 Atwater CA   6529 T-MOBILE USA, INC. 738   2010-09-05   
209-812 6 Atwater CA   516C AT&T CORP. 738   2007-09-14   
209-812 7 Atwater CA   649C ONVOY, LLC - CA 738   2017-09-10   
209-812 8 Atwater CA   649C ONVOY, LLC - CA 738   2010-03-08   
209-812 9 Atwater CA   6529 T-MOBILE USA, INC. 738   2010-06-11   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.