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: 800

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
978-800 A Littleton MA CMBRMAORDSG  4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
978-800 0 Littleton MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128      
978-800 1 Littleton MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2005-02-11   
978-800 2 Littleton MA   892D ONVOY, LLC - MA 128   2022-10-02   
978-800 3 Littleton MA   892D ONVOY, LLC - MA 128   2010-03-15   
978-800 4 Littleton MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2002-10-20   
978-800 6 Littleton MA   892D ONVOY, LLC - MA 128   2022-10-02   
978-800 7 Littleton MA   892D ONVOY, LLC - MA 128   2022-10-02   
978-800 8 Littleton MA   892D ONVOY, LLC - MA 128   2017-10-08   

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.