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]

Block: A

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NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
227-777 A Ashton (Baltimore LATA) MD BLTMMDCHYMD  530H WIDE VOICE, LLC - MD 238      
227-800 A Frederick MD FRDRMDFRXPX  624H ONVOY SPECTRUM, LLC 240   2025-01-02   
227-888 A Washington Zone 15 (Baltimore LATA) MD BLTMMDCHYMD  530H WIDE VOICE, LLC - MD 238      
227-997 A Washington Zone 2 MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2025-04-11   
227-998 A Washington Zone 2 MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2024-11-22   
227-999 A Washington Zone 10 MD WASHDCSWFMD  530H WIDE VOICE, LLC - MD 236      

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Last updated: Mon, 15 Sep 2025 02:24:40 UTC

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