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: 284

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
301-284 A Washington Zone 10 MD WASKDCFNPS0  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-284 0 Washington Zone 10 MD   071F BANDWIDTH.COM CLEC, LLC - MD 236   2014-05-30   
301-284 1 Washington Zone 10 MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-284 2 Washington Zone 10 MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-284 3 Washington Zone 10 MD   876D ONVOY, LLC - MD 236   2016-01-29   
301-284 4 Washington Zone 10 MD   5978 BROADVIEW NETWORKS, INC. - VA 236   2013-03-12   
301-284 5 Washington Zone 10 MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-284 6 Washington Zone 10 MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-284 7 Washington Zone 10 MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      
301-284 8 Washington Zone 10 MD   071F BANDWIDTH.COM CLEC, LLC - MD 236   2004-11-21   
301-284 9 Washington Zone 10 MD   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 236      

Last updated: Sun, 04 Apr 2021 19:28:27 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.