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: 449

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
667-449 A Preston MD SLBRMD901MD  939H COMMIO, LLC 242      
667-449 0 Preston MD SLBRMD901MD  939H COMMIO, LLC 242   2023-11-04   
667-449 1 Preston MD SLBRMD901MD  939H COMMIO, LLC 242   2023-11-04   
667-449 2 Preston MD SLBRMD901MD  939H COMMIO, LLC 242   2023-11-04   
667-449 3 Preston MD SLBRMD901MD  939H COMMIO, LLC 242   2023-11-04   
667-449 4 Preston MD SLBRMD901MD  939H COMMIO, LLC 242   2023-11-04   

Last updated: Thu, 16 Oct 2025 03:04:18 UTC

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