Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 821 [Rate centres in NPA 821] [Dial plan for NPA 821]

NXX: 529

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
821-529 A McCormick SC   548E ONVOY, LLC - SC 430   2026-02-17   
821-529 0 McCormick SC   548E ONVOY, LLC - SC 430   2026-02-17   
821-529 9 McCormick SC   548E ONVOY, LLC - SC 430   2026-02-17   

Last updated: Tue, 13 Jan 2026 21:50:02 UTC

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