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.
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Switch: WHMRMDATPS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
240-755 A Laurel (Baltimore LATA) MD 107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238      
410-497 A Parkville MD 107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238      
410-870 A Parkville MD 107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238   2005-04-03   
443-275 A Towson MD 107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238      
443-559 A Essex MD 107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238      
443-660 A Pikesville MD 107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 238      

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

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