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: 728

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
571-728 A Washington Zone 8 VA VINNVACB8MD  114J EXIANT COMMUNICATIONS LLC 236   2025-07-13   
571-728 0 Washington Zone 8 VA VINNVACBDS0  138E ONVOY, LLC - VA 236   2025-10-12   
571-728 1 Washington Zone 8 VA VINNVACB8MD  114J EXIANT COMMUNICATIONS LLC 236   2025-07-13   
571-728 2 Washington Zone 8 VA CHCHMDBEWMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-09-13   
571-728 3 Washington Zone 8 VA CHCHMDBEWMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-09-13   
571-728 4 Washington Zone 8 VA CHCHMDBEWMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-09-13   
571-728 5 Washington Zone 8 VA CHCHMDBEWMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-09-13   
571-728 6 Washington Zone 8 VA OCQNVAXAVMD  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2025-08-18   
571-728 7 Washington Zone 8 VA OCQNVAXAVMD  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236   2025-08-18   
571-728 8 Washington Zone 8 VA CHCHMDBEWMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-09-13   
571-728 9 Washington Zone 8 VA CHCHMDBEWMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-09-13   

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

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