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: 444

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
227-444 A Washington Zone 2 MD   876D ONVOY, LLC - MD 236   2025-10-16   
227-444 4 Washington Zone 2 MD   876D ONVOY, LLC - MD 236   2025-10-16   
227-444 5 Washington Zone 2 MD   876D ONVOY, LLC - MD 236   2025-10-16   
227-444 6 Washington Zone 2 MD   876D ONVOY, LLC - MD 236   2025-10-16   
227-444 7 Washington Zone 2 MD   876D ONVOY, LLC - MD 236   2025-10-16   
227-444 8 Washington Zone 2 MD   876D ONVOY, LLC - MD 236   2025-10-19   
227-444 9 Washington Zone 2 MD   876D ONVOY, LLC - MD 236   2025-10-19   

Last updated: Sun, 07 Dec 2025 22:02:11 UTC

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