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: 820 [Rate centres in NPA 820] [Dial plan for NPA 820]

NXX: 244

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
820-244 A Santa Maria CA   649C ONVOY, LLC - CA 740   2025-11-24   
820-244 0 Santa Maria CA   649C ONVOY, LLC - CA 740   2025-11-24   
820-244 1 Santa Maria CA   6010 NEW CINGULAR WIRELESS PCS, LLC 740   2025-11-25   
820-244 4 Santa Maria CA   145J TERRA NOVA TELECOM INC. 740   2025-11-25   
820-244 8 Santa Maria CA   649C ONVOY, LLC - CA 740   2026-02-23   
820-244 9 Santa Maria CA   649C ONVOY, LLC - CA 740   2026-01-11   

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.