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: 586

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
978-586 A Bolton MA   829J PAETEC ITEL, LLC 128      
978-586 0 Bolton MA   829J PAETEC ITEL, LLC 128      
978-586 1 Bolton MA   829J PAETEC ITEL, LLC 128   2007-12-03   
978-586 2 Bolton MA   892D ONVOY, LLC - MA 128   2017-02-03   
978-586 3 Bolton MA   7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 128   2007-08-01   
978-586 4 Bolton MA   624H ONVOY SPECTRUM, LLC 128   2021-03-03   
978-586 5 Bolton MA   829J PAETEC ITEL, LLC 128   2012-10-08   
978-586 6 Bolton MA   624H ONVOY SPECTRUM, LLC 128   2021-01-15   
978-586 8 Bolton MA   515J IP HORIZON LLC 128   2015-10-26   
978-586 9 Bolton MA   268F PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 128   2013-05-04   

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

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.