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: 274

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
227-274 A Washington Zone 10 MD   876D ONVOY, LLC - MD 236   2025-05-10   
227-274 0 Washington Zone 10 MD   876D ONVOY, LLC - MD 236   2025-05-10   
227-274 1 Washington Zone 10 MD   876D ONVOY, LLC - MD 236   2025-05-10   
227-274 2 Washington Zone 10 MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-06-02   
227-274 3 Washington Zone 10 MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-06-02   
227-274 4 Washington Zone 10 MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-06-02   
227-274 5 Washington Zone 10 MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-06-02   
227-274 6 Washington Zone 10 MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-06-02   
227-274 7 Washington Zone 10 MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-06-02   
227-274 8 Washington Zone 10 MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-06-02   
227-274 9 Washington Zone 10 MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 236   2025-06-02   

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

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