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: 300

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
667-300 A Columbia MD BLTMMD91GT0  2593 CORE COMMUNICATIONS, INC.- MD 238      
667-300 0 Columbia MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-07-23   
667-300 1 Columbia MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-07-23   
667-300 2 Columbia MD BLTMMDCHXQX  197D VONAGE AMERICA LLC 238   2018-12-06   
667-300 3 Columbia MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-07-23   
667-300 4 Columbia MD BLTMMDCHXQX  197D VONAGE AMERICA LLC 238   2018-12-06   
667-300 5 Columbia MD BLTMMDCHXQX  197D VONAGE AMERICA LLC 238   2018-12-06   
667-300 6 Columbia MD BLTMMDCHXQX  197D VONAGE AMERICA LLC 238   2018-12-06   
667-300 7 Columbia MD BLTMMDCHXQX  197D VONAGE AMERICA LLC 238   2018-12-06   
667-300 8 Columbia MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2018-08-04   
667-300 9 Columbia MD CLMAMDORGT0  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 238   2018-08-04   

Last updated: Sun, 01 Jun 2025 02:18:11 UTC

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