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: 228

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
820-228 A Lompoc CA SNBBCAXFXTY  506J TWILIO INTERNATIONAL, INC. 740   2024-12-28   
820-228 0 Lompoc CA SNBBCAXFXVY  649C ONVOY, LLC - CA 740   2024-08-26   
820-228 1 Lompoc CA SNBBCAXFXVY  649C ONVOY, LLC - CA 740   2024-08-26   
820-228 2 Lompoc CA SNBBCAXFXTY  506J TWILIO INTERNATIONAL, INC. 740   2024-12-29   
820-228 4 Lompoc CA   6010 NEW CINGULAR WIRELESS PCS, LLC 740   2025-09-05   
820-228 6 Lompoc CA   7139 TELEPORT COMMUNICATIONS AMERICA, LLC - CA 740   2026-04-20   
820-228 7 Lompoc CA SNLOCA01XEY  6006 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 740   2024-12-26   
820-228 9 Lompoc CA GOLTCACEBMD  6010 NEW CINGULAR WIRELESS PCS, LLC 740   2024-10-19   

Last updated: Tue, 31 Mar 2026 13:56:49 UTC

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