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: 617 [Rate centres in NPA 617] [Dial plan for NPA 617]

NXX: 819

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
617-819 A Chelsea MA BSTNMABLDS3  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
617-819 0 Chelsea MA SOVLMAABDS2  268F PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 128   2020-08-24   
617-819 1 Chelsea MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2010-03-15   
617-819 2 Chelsea MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-03-06   
617-819 3 Chelsea MA BSTNMABLDS3  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      
617-819 4 Chelsea MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128   2010-02-19   
617-819 5 Chelsea MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128   2010-11-15   
617-819 6 Chelsea MA CMBRMABENMD  624H ONVOY SPECTRUM, LLC 128   2021-04-08   
617-819 7 Chelsea MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-04-06   
617-819 8 Chelsea MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2010-04-07   
617-819 9 Chelsea MA BSTNMABLDS3  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128      

Last updated: Wed, 01 Jun 2022 03:09:23 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.