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: 421

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
667-421 A Columbia MD BLTMMDCHX7X  073H TELNYX LLC 238      
667-421 0 Columbia MD BLTQMD019MD  490J DISH WIRELESS, LLC 238   2024-01-21   
667-421 1 Columbia MD BLTQMD019MD  490J DISH WIRELESS, LLC 238   2024-04-26   
667-421 2 Columbia MD   876D ONVOY, LLC - MD 238   2024-02-25   
667-421 3 Columbia MD   876D ONVOY, LLC - MD 238   2024-02-25   
667-421 4 Columbia MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2024-03-21   
667-421 5 Columbia MD   6395 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 238   2024-03-21   
667-421 7 Columbia MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2023-06-26   
667-421 8 Columbia MD BLTMMDCHX7X  073H TELNYX LLC 238   2023-04-24   
667-421 9 Columbia MD BLTMMDCH40Z  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 238   2023-06-26   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

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