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: BLTMMDSN6MD

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
443-550 A North Beach MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      
443-818 A Armiger-Gibson Island MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238   2006-02-20   
443-898 A Pikesville MD 6119 LEVEL 3 COMMUNICATIONS, LLC - MD 238      

Last updated: Thu, 10 Sep 2020 02:15:24 UTC

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