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: 344

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
667-344 A Chase MD BLTMMDCHX7X  073H TELNYX LLC 238      
667-344 0 Chase MD BLTMMDCHX7X  073H TELNYX LLC 238   2017-04-26   
667-344 1 Chase MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
667-344 2 Chase MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
667-344 3 Chase MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
667-344 4 Chase MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-22   
667-344 5 Chase MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
667-344 6 Chase MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-03-28   
667-344 7 Chase MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2019-05-02   
667-344 8 Chase MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2019-01-19   
667-344 9 Chase MD   145J TERRA NOVA TELECOM INC. 238   2025-07-25   

Last updated: Tue, 16 Jun 2026 00:09:45 UTC

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