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: 233

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
820-233 A San Luis Obispo CA SNBBCAXF9MD  616J LEAP TELECOM, LLC 740   2024-11-22   
820-233 0 San Luis Obispo CA SNBBCAXF9MD  616J LEAP TELECOM, LLC 740   2024-11-22   
820-233 9 San Luis Obispo CA   649C ONVOY, LLC - CA 740   2025-04-06   

Last updated: Wed, 18 Jun 2025 02:30:00 UTC

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