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: 554

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
667-554 A Columbia MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2026-11-06   
667-554 0 Columbia MD   071F BANDWIDTH.COM CLEC, LLC - MD 238   2026-11-09   
667-554 1 Columbia MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2026-11-09   
667-554 2 Columbia MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2026-11-09   
667-554 4 Columbia MD   820C INTRADO COMMUNICATIONS, LLC 238   2026-11-09   
667-554 5 Columbia MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2026-11-06   
667-554 6 Columbia MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2026-11-06   
667-554 7 Columbia MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2026-11-06   
667-554 8 Columbia MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2026-11-06   
667-554 9 Columbia MD   4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2026-11-06   

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

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