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: 771

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
667-771 A Baltimore MD BLTMMDCHYMD  530H WIDE VOICE, LLC - MD 238      
667-771 0 Baltimore MD   820C INTRADO COMMUNICATIONS, LLC 238   2016-08-20   
667-771 1 Baltimore MD   530H WIDE VOICE, LLC - MD 238   2016-02-04   
667-771 2 Baltimore MD   551G NUSO, LLC 238   2016-08-31   
667-771 3 Baltimore MD   551G NUSO, LLC 238   2016-08-31   
667-771 4 Baltimore MD   551G NUSO, LLC 238   2016-08-31   
667-771 5 Baltimore MD   551G NUSO, LLC 238   2016-08-31   
667-771 6 Baltimore MD   551G NUSO, LLC 238   2016-08-31   
667-771 7 Baltimore MD   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2016-11-05   
667-771 8 Baltimore MD   568G PEERLESS NETWORK OF MARYLAND, LLC 238   2016-11-05   
667-771 9 Baltimore MD   515J IP HORIZON LLC 238   2016-05-31   

Last updated: Thu, 01 Jan 2026 03:59:49 UTC

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