Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 520 [Rate centres in NPA 520] [Dial plan for NPA 520]

NXX: 362

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
520-362 A West San Simon AZ SNRSAZXCRS0  2173 TOHONO O'ODHAM UTILITY AUTHORITY 668      

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

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