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: 571 [Rate centres in NPA 571] [Dial plan for NPA 571]

NXX: 400

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
571-400 A Washington Zone 8 VA WASHDC12KMD  145J TERRA NOVA TELECOM INC. 236      
571-400 0 Washington Zone 8 VA   145J TERRA NOVA TELECOM INC. 236   2019-05-16   
571-400 1 Washington Zone 8 VA WASKDCFNAMD  6827 CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 236   2019-09-09   
571-400 2 Washington Zone 8 VA MCLNVA23DS4  8825 LEVEL 3 COMMUNICATIONS, LLC - VA 236   2020-01-11   
571-400 3 Washington Zone 8 VA ARTNVAARDS2  275G PEERLESS NETWORK OF VIRGINIA, LLC - VA 236   2019-08-24   
571-400 4 Washington Zone 8 VA MCLNVA23DS4  8825 LEVEL 3 COMMUNICATIONS, LLC - VA 236   2019-08-24   
571-400 5 Washington Zone 8 VA ARTNVAARDS2  275G PEERLESS NETWORK OF VIRGINIA, LLC - VA 236   2019-09-13   
571-400 6 Washington Zone 8 VA ARTNVAARDS2  275G PEERLESS NETWORK OF VIRGINIA, LLC - VA 236   2019-09-13   
571-400 7 Washington Zone 8 VA ARTNVAARDS2  275G PEERLESS NETWORK OF VIRGINIA, LLC - VA 236   2019-12-31   
571-400 8 Washington Zone 8 VA BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2019-09-13   
571-400 9 Washington Zone 8 VA BTVLMD12CMA  6855 OMNIPOINT COMMUNICATIONS CAP OPERATIONS, LLC 236   2019-09-13   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.