Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 571 [Rate centres in NPA 571] [Dial plan for NPA 571]

NXX: 780

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
571-780 A Washington Zone 17 VA   138E ONVOY, LLC - VA 236   2026-10-10   
571-780 0 Washington Zone 17 VA   138E ONVOY, LLC - VA 236   2026-10-10   

Last updated: Tue, 01 Sep 2026 00:40:05 UTC

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