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: 227

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
227-227 A Gaithersburg MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2024-03-30   
227-227 0 Gaithersburg MD   876D ONVOY, LLC - MD 236   2024-03-30   
227-227 1 Gaithersburg MD   876D ONVOY, LLC - MD 236   2024-03-30   
227-227 2 Gaithersburg MD   876D ONVOY, LLC - MD 236   2024-03-31   
227-227 3 Gaithersburg MD   624H ONVOY SPECTRUM, LLC 236   2024-07-06   
227-227 4 Gaithersburg MD   624H ONVOY SPECTRUM, LLC 236   2024-07-06   
227-227 5 Gaithersburg MD   624H ONVOY SPECTRUM, LLC 236   2024-07-06   
227-227 6 Gaithersburg MD   876D ONVOY, LLC - MD 236   2024-04-13   
227-227 7 Gaithersburg MD   145J TERRA NOVA TELECOM INC. 236   2024-04-21   
227-227 8 Gaithersburg MD   876D ONVOY, LLC - MD 236   2024-04-04   
227-227 9 Gaithersburg MD   876D ONVOY, LLC - MD 236   2024-04-04   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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