Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
  • Effective date searches are available only for US area codes. Our sources for non-US NPA-NXX data do not provide this information.
  • If you want to search an entire area code regardless of activity, leave both the next and past days fields set to zero.

OCN: 7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD

<< 1 2 3 4 5 6 7

NPA-NXX BLOCK Rate Centre Region Switch LATA LIR Eff date Disc date
667-234 8 Baltimore MD BLTMMDFMDS0  238   2015-06-08   
667-274 1 Elkridge MD BLTMMDCHCMD  238   2020-08-17   
667-285 6 Hurlock MD SLBRMDSBXUX  242   2018-01-05   
667-318 7 Cockeysville MD BLTMMDCHCMD  238   2021-10-25   
667-337 7 Centreville MD SLBRMDSBXUX  242   2021-07-12   
667-687 7 Warwick MD   242   2022-11-09   
667-786 A Columbia MD CLMAMDNIDS1  238      
667-786 5 Columbia MD CLMAMDNIDS1  238   2016-01-04   
667-786 6 Columbia MD CLMAMDNIDS1  238   2016-01-04   
667-895 6 Baltimore MD BLTMMDCHCMD  238   2020-12-14   

<< 1 2 3 4 5 6 7

Last updated: Tue, 15 Nov 2022 00:10:00 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.