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: 922

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
520-922 A Tucson AZ   883K AHOI LLC 668   2026-04-30   
520-922 2 Tucson AZ   883K AHOI LLC 668   2026-04-30   

Last updated: Tue, 16 Jun 2026 00:09:45 UTC

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