Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 227 [Rate centres in NPA 227] [Dial plan for NPA 227]

NXX: 772

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
227-772 A Washington Zone 4 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236   2025-01-02   
227-772 0 Washington Zone 4 MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2025-01-09   
227-772 1 Washington Zone 4 MD BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2025-01-16   
227-772 2 Washington Zone 4 MD   876D ONVOY, LLC - MD 236   2025-10-12   
227-772 3 Washington Zone 4 MD   876D ONVOY, LLC - MD 236   2025-11-28   
227-772 4 Washington Zone 4 MD   490J BOOST SUBSCRIBERCO L.L.C. 236   2025-02-24   
227-772 5 Washington Zone 4 MD   490J BOOST SUBSCRIBERCO L.L.C. 236   2025-04-28   
227-772 6 Washington Zone 4 MD   490J BOOST SUBSCRIBERCO L.L.C. 236   2025-06-23   
227-772 7 Washington Zone 4 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236   2025-01-02   
227-772 8 Washington Zone 4 MD WASHDCSWMMD  624H ONVOY SPECTRUM, LLC 236   2025-01-02   
227-772 9 Washington Zone 4 MD   876D ONVOY, LLC - MD 236   2025-04-06   

Last updated: Sat, 04 Jul 2026 13:07:56 UTC

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