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.

NPA: 240 [Rate centres in NPA 240] [Dial plan for NPA 240]

NXX:

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
240-244 A Washington Zone 16 MD LNHMMDADDS0  8832 STARPOWER COMMUNICATIONS, LLC - MD 236      
240-244 0 Washington Zone 16 MD   071F BANDWIDTH.COM CLEC, LLC - MD 236   2010-09-03   
240-244 1 Washington Zone 16 MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 236   2006-03-03   
240-244 2 Washington Zone 16 MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 236   2016-06-07   
240-244 3 Washington Zone 16 MD   071F BANDWIDTH.COM CLEC, LLC - MD 236   2007-09-13   
240-244 4 Washington Zone 16 MD   087F CBEYOND COMMUNICATIONS, LLC - MD 236   2008-10-05   
240-244 5 Washington Zone 16 MD   107D COMCAST PHONE OF NORTHERN MARYLAND, INC. - MD 236   2007-01-19   
240-244 6 Washington Zone 16 MD   071F BANDWIDTH.COM CLEC, LLC - MD 236   2010-02-22   
240-244 7 Washington Zone 16 MD   071F BANDWIDTH.COM CLEC, LLC - MD 236   2010-10-28   
240-244 8 Washington Zone 16 MD   8832 STARPOWER COMMUNICATIONS, LLC - MD 236      
240-244 9 Washington Zone 16 MD   071F BANDWIDTH.COM CLEC, LLC - MD 236   2008-12-13   

Last updated: Thu, 31 Jan 2019 11:20:40 UTC

Sponsored by: VoiceMeUp - Corporate VoIP Services

Like this site? We accept donations via PayPal.