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: SNLOCA88PS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
805-219 A Guadalupe CA 776C CHARTER FIBERLINK CA-CCO, LLC - CA 740      
805-439 A San Luis Obispo CA 776C CHARTER FIBERLINK CA-CCO, LLC - CA 740      

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.