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: 307

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
667-307 A Crofton MD BLTQMD01DS0  568G PEERLESS NETWORK OF MARYLAND, LLC 238      
667-307 0 Crofton MD   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-06-08   
667-307 1 Crofton MD   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2013-06-08   
667-307 2 Crofton MD   073H TELNYX LLC 238   2017-04-26   
667-307 3 Crofton MD   964H BARR TELL USA, INC. 238   2016-12-17   
667-307 4 Crofton MD   318J COMCAST IP PHONE, LLC 238   2013-11-15   
667-307 5 Crofton MD   2593 CORE COMMUNICATIONS, INC.- MD 238   2018-06-16   
667-307 6 Crofton MD   876D ONVOY, LLC - MD 238   2024-03-03   
667-307 7 Crofton MD   876D ONVOY, LLC - MD 238   2016-03-23   
667-307 8 Crofton MD   876D ONVOY, LLC - MD 238   2016-03-23   
667-307 9 Crofton MD   515J IP HORIZON LLC 238   2016-01-04   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

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