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: 225

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
301-225 A Washington Zone 14 MD WASHDCDTDS1  7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-225 0 Washington Zone 14 MD   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-225 1 Washington Zone 14 MD   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-225 2 Washington Zone 14 MD   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-225 3 Washington Zone 14 MD   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-225 4 Washington Zone 14 MD   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-225 5 Washington Zone 14 MD   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-225 6 Washington Zone 14 MD   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-225 7 Washington Zone 14 MD   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-225 8 Washington Zone 14 MD   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      
301-225 9 Washington Zone 14 MD   7529 TELEPORT COMMUNICATIONS AMERICA, LLC - DC 236      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.