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: 978 [Rate centres in NPA 978] [Dial plan for NPA 978]

NXX: 734

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
978-734 A Concord MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128      
978-734 2 Concord MA SOVLMAABDS2  268F PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 128   2020-04-13   
978-734 3 Concord MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-08-14   
978-734 4 Concord MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-08-14   

Last updated: Sun, 27 Apr 2025 12:48:38 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.