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: 247

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
227-247 A Thurmont MD CMLDMDCMEMD  876D ONVOY, LLC - MD 240   2024-08-15   
227-247 0 Thurmont MD CMLDMDCMEMD  876D ONVOY, LLC - MD 240   2024-08-15   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

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