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: 781 [Rate centres in NPA 781] [Dial plan for NPA 781]

NXX: 604

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
781-604 A Winchester MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2024-03-05   
781-604 0 Winchester MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128      
781-604 1 Winchester MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2010-03-15   
781-604 2 Winchester MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128      
781-604 3 Winchester MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128      
781-604 4 Winchester MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2022-09-25   
781-604 6 Winchester MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2016-04-11   
781-604 7 Winchester MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2016-04-11   
781-604 8 Winchester MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2022-09-25   
781-604 9 Winchester MA SOVLMAABDS2  268F PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 128   2013-05-05   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.