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: 242

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
227-242 A Middletown MD CMLDMDCMEMD  876D ONVOY, LLC - MD 240   2024-07-27   
227-242 0 Middletown MD CMLDMDCMEMD  876D ONVOY, LLC - MD 240   2024-07-27   

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

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