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.

Switch: BRTNMACOVMD

<< 1 2

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
857-524 6 South Boston MA 7135 TC SYSTEMS, INC. 128   2020-05-04   
857-574 3 East Boston MA 7135 TC SYSTEMS, INC. 128   2009-08-13   
857-971 2 Charlestown MA 7135 TC SYSTEMS, INC. 128   2016-06-20   
978-286 6 Sterling MA 7135 TC SYSTEMS, INC. 128   2018-10-05   
978-780 6 Athol MA 7135 TC SYSTEMS, INC. 128   2019-04-05   
978-797 6 Rockport MA 7135 TC SYSTEMS, INC. 128   2018-10-05   

<< 1 2

Last updated: Thu, 16 Jul 2026 02:21:55 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.