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.

Switch: OLNDCAXEPS0

Remotes:

Switch Switch name Switch type
PLTICAXFRP0  PLATINA  RP 
TRCTCAXFRP1  TRINITY CENTER  RP 
NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
530-357 A Olinda CA 2321 HAPPY VALLEY TEL. CO. 724      
530-396 A Olinda CA 2321 HAPPY VALLEY TEL. CO. 724      

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.