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: 368

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
227-368 A Mechanicsville MD WASHDCSWFMD  530H WIDE VOICE, LLC - MD 236      
227-368 0 Mechanicsville MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2024-03-07   
227-368 1 Mechanicsville MD   876D ONVOY, LLC - MD 236   2025-10-12   
227-368 6 Mechanicsville MD WASHDCSWFMD  530H WIDE VOICE, LLC - MD 236   2023-10-21   

Last updated: Thu, 20 Nov 2025 13:34:34 UTC

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