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: 857 [Rate centres in NPA 857] [Dial plan for NPA 857]

NXX: 386

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-386 A Chelsea MA CHLSMACHDS0  9102 VERIZON NEW ENGLAND INC. 128      
857-386 0 Chelsea MA BSTPMALLOMD  073H TELNYX LLC 128   2017-04-28   
857-386 1 Chelsea MA SOVLMAABDS2  268F PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 128   2018-10-30   
857-386 2 Chelsea MA CHLSMACHDS0  9102 VERIZON NEW ENGLAND INC. 128   2016-09-03   
857-386 3 Chelsea MA CHLSMACHDS0  9102 VERIZON NEW ENGLAND INC. 128   2016-09-03   
857-386 4 Chelsea MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2020-06-21   
857-386 5 Chelsea MA CHTWMABF2MD  671J U.S. TELEPACIFIC CORP. DBA TPX COMMUNICATIONS 128   2017-04-14   
857-386 6 Chelsea MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2019-02-23   
857-386 7 Chelsea MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2019-02-23   
857-386 8 Chelsea MA SOVLMAABDS2  268F PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 128   2018-11-08   
857-386 9 Chelsea MA   515J IP HORIZON LLC 128   2017-07-02   

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

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.