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: 300

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
978-300 A Townsend MA SOVLMAABDS2  268F PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 128      
978-300 0 Townsend MA   990E BANDWIDTH.COM CLEC, LLC - MA 128      
978-300 1 Townsend MA   892D ONVOY, LLC - MA 128   2023-07-23   
978-300 2 Townsend MA   268F PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 128      
978-300 3 Townsend MA   892D ONVOY, LLC - MA 128   2021-07-10   
978-300 4 Townsend MA   892D ONVOY, LLC - MA 128   2021-07-10   
978-300 5 Townsend MA   318J COMCAST IP PHONE, LLC 128   2005-01-20   
978-300 6 Townsend MA   892D ONVOY, LLC - MA 128   2021-08-14   
978-300 7 Townsend MA   892D ONVOY, LLC - MA 128   2021-08-14   
978-300 8 Townsend MA   268F PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 128   2013-05-05   

Last updated: Thu, 29 Jan 2026 14:35:03 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.