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: 422

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
978-422 A Sterling MA STNGMABRRS1  9102 VERIZON NEW ENGLAND INC. 128      
978-422 0 Sterling MA   9102 VERIZON NEW ENGLAND INC. 128      
978-422 1 Sterling MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2005-02-14   
978-422 2 Sterling MA   9102 VERIZON NEW ENGLAND INC. 128      
978-422 3 Sterling MA   9102 VERIZON NEW ENGLAND INC. 128      
978-422 4 Sterling MA   4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2004-01-13   
978-422 5 Sterling MA   9102 VERIZON NEW ENGLAND INC. 128      
978-422 6 Sterling MA   9102 VERIZON NEW ENGLAND INC. 128      
978-422 7 Sterling MA   9102 VERIZON NEW ENGLAND INC. 128      
978-422 8 Sterling MA   9102 VERIZON NEW ENGLAND INC. 128      
978-422 9 Sterling MA   9102 VERIZON NEW ENGLAND INC. 128      

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.