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: 301 [Rate centres in NPA 301] [Dial plan for NPA 301]

NXX:

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
301-715 A Washington Zone 15 MD WASHDCTTDS0  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-715 0 Washington Zone 15 MD   082H LOCAL ACCESS LLC - MD 236   2019-04-26   
301-715 1 Washington Zone 15 MD   2593 CORE COMMUNICATIONS, INC. - MD 236   2018-06-16   
301-715 2 Washington Zone 15 MD   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-715 3 Washington Zone 15 MD   6119 LEVEL 3 COMMUNICATIONS, LLC - MD 236   2009-10-09   
301-715 4 Washington Zone 15 MD   2593 CORE COMMUNICATIONS, INC. - MD 236   2018-06-16   
301-715 5 Washington Zone 15 MD   2593 CORE COMMUNICATIONS, INC. - MD 236   2018-06-16   
301-715 8 Washington Zone 15 MD   568G PEERLESS NETWORK OF MARYLAND, LLC 236   2016-11-19   
301-715 9 Washington Zone 15 MD   082H LOCAL ACCESS LLC - MD 236   2019-04-26   

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.