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: 764

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
571-764 A Occoquan VA VINNVACBDS0  138E ONVOY, LLC - VA 236   2026-07-11   
571-764 0 Occoquan VA VINNVACBDS0  138E ONVOY, LLC - VA 236   2026-07-11   
571-764 5 Occoquan VA WASHDC127MD  073H TELNYX LLC 236   2026-07-13   
571-764 8 Occoquan VA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2026-08-07   
571-764 9 Occoquan VA   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2026-08-07   

Last updated: Sat, 01 Aug 2026 03:19:33 UTC

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