Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 667 [Rate centres in NPA 667] [Dial plan for NPA 667]

NXX: 501

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
667-501 A Dundalk MD CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2025-02-02   
667-501 0 Dundalk MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2026-10-16   
667-501 7 Dundalk MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2025-02-16   
667-501 8 Dundalk MD CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2025-02-02   
667-501 9 Dundalk MD CLMAMDORAMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2025-02-02   

Last updated: Sat, 10 Oct 2026 15:24:20 UTC

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