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.

Switch: BLTMMDCHCMD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
240-859 6 Ashton (Baltimore LATA) MD 7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238   2016-12-09   
240-972 6 Laurel (Baltimore LATA) MD 7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238   2016-03-21   
301-612 A Washington Zone 14 (Baltimore LATA) MD 7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
301-612 6 Washington Zone 14 (Baltimore LATA) MD 7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238   2012-12-09   
410-631 3 Baltimore MD 7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238   2020-10-12   
667-232 A Glen Burnie MD 7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238      
667-232 8 Glen Burnie MD 7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238   2018-06-04   
667-274 1 Elkridge MD 7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238   2020-08-17   
667-895 6 Baltimore MD 7325 TELEPORT COMMUNICATIONS AMERICA, LLC - MD 238   2020-12-14   

Last updated: Tue, 04 May 2021 15:04:27 UTC

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