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: 257

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
227-257 A Washington Zone 14 MD   876D ONVOY, LLC - MD 236   2024-12-05   
227-257 0 Washington Zone 14 MD   876D ONVOY, LLC - MD 236      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

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