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: 971

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
301-971 A Washington Zone 6 MD LNHMMDADGT0  8832 STARPOWER COMMUNICATIONS, LLC - MD 236      
301-971 0 Washington Zone 6 MD WASHDC12DS6  568G PEERLESS NETWORK OF MARYLAND, LLC 236      
301-971 1 Washington Zone 6 MD LARLMDCCDS0  4492 VDL, INC. DBA GLOBAL TELECOM BROKERS - MD 236      
301-971 2 Washington Zone 6 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
301-971 3 Washington Zone 6 MD HRNDVACKBMD  9170 BROADVIEW NETWORKS, INC. - MD 236      
301-971 4 Washington Zone 6 MD WASHDCDP8MD  071F BANDWIDTH.COM CLEC, LLC - MD 236      
301-971 5 Washington Zone 6 MD OXHLMDOHDS0  9212 VERIZON MARYLAND, INC. 236      
301-971 6 Washington Zone 6 MD OXHLMDOHDS0  9212 VERIZON MARYLAND, INC. 236      
301-971 7 Washington Zone 6 MD BTVLMD12CM9  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236      
301-971 8 Washington Zone 6 MD LNHMMDADGT0  8832 STARPOWER COMMUNICATIONS, LLC - MD 236      
301-971 9 Washington Zone 6 MD   515J IP HORIZON LLC 236      

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.