Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 820 [Rate centres in NPA 820] [Dial plan for NPA 820]

NXX: 221

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
820-221 A Santa Maria CA GOLTCACEBMD  6010 NEW CINGULAR WIRELESS PCS, LLC 740      
820-221 0 Santa Maria CA   939H COMMIO, LLC 740   2024-01-28   
820-221 1 Santa Maria CA   939H COMMIO, LLC 740   2024-01-28   
820-221 2 Santa Maria CA   649C ONVOY, LLC - CA 740   2025-09-27   
820-221 3 Santa Maria CA   649C ONVOY, LLC - CA 740   2024-02-23   
820-221 4 Santa Maria CA   649C ONVOY, LLC - CA 740   2024-02-23   
820-221 5 Santa Maria CA   649C ONVOY, LLC - CA 740   2024-02-23   
820-221 6 Santa Maria CA   649C ONVOY, LLC - CA 740   2024-02-23   
820-221 7 Santa Maria CA   649C ONVOY, LLC - CA 740   2024-02-23   
820-221 8 Santa Maria CA   6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 740   2024-02-16   
820-221 9 Santa Maria CA   6010 NEW CINGULAR WIRELESS PCS, LLC 740   2023-12-17   

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

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