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: 739

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
571-739 A Washington Zone 8 VA   138E ONVOY, LLC - VA 236   2025-12-06   
571-739 0 Washington Zone 8 VA   138E ONVOY, LLC - VA 236   2025-12-06   
571-739 1 Washington Zone 8 VA   138E ONVOY, LLC - VA 236   2026-01-11   
571-739 2 Washington Zone 8 VA   187K BARR TELL USA 236   2026-07-06   
571-739 5 Washington Zone 8 VA   138E ONVOY, LLC - VA 236   2026-04-14   
571-739 6 Washington Zone 8 VA   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2025-12-08   
571-739 7 Washington Zone 8 VA   138E ONVOY, LLC - VA 236   2026-02-23   
571-739 8 Washington Zone 8 VA   138E ONVOY, LLC - VA 236   2026-01-11   
571-739 9 Washington Zone 8 VA   138E ONVOY, LLC - VA 236   2026-01-11   

Last updated: Sun, 17 May 2026 03:26:51 UTC

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