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: 258

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
227-258 A Gaithersburg MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-12-22   
227-258 0 Gaithersburg MD WASKDCFNAMD  6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 236   2024-12-23   
227-258 1 Gaithersburg MD VINNVACBDS0  876D ONVOY, LLC - MD 236   2025-01-06   
227-258 2 Gaithersburg MD   876D ONVOY, LLC - MD 236   2025-03-02   
227-258 3 Gaithersburg MD   876D ONVOY, LLC - MD 236   2025-05-03   
227-258 4 Gaithersburg MD   876D ONVOY, LLC - MD 236   2025-05-03   
227-258 5 Gaithersburg MD   6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2025-05-31   
227-258 8 Gaithersburg MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-12-22   
227-258 9 Gaithersburg MD BTVLMD18GT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2024-12-22   

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

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