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: 230

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
227-230 A Washington Zone 5 MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2024-03-30   
227-230 0 Washington Zone 5 MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2024-03-30   
227-230 4 Washington Zone 5 MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2024-07-05   
227-230 5 Washington Zone 5 MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2024-07-27   
227-230 6 Washington Zone 5 MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2024-07-27   
227-230 8 Washington Zone 5 MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2024-03-31   
227-230 9 Washington Zone 5 MD   876D ONVOY, LLC - MD 236   2025-09-28   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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