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: FRMNMAWADS0

NPA-NXX BLOCK Rate Centre Region OCN LATA LIR Eff date Disc date
508-305 A Marlboro MA 7421 AT&T LOCAL 128      
508-309 A Framingham MA 7421 AT&T LOCAL 128      
508-346 A Franklin MA 7421 AT&T LOCAL 128      
508-433 A Natick MA 7421 AT&T LOCAL 128      
508-466 A Northboro MA 7421 AT&T LOCAL 128      
508-918 A Franklin MA 7421 AT&T LOCAL 128      
978-261 A Sudbury MA 7421 AT&T LOCAL 128      
978-489 A Acton MA 7421 AT&T LOCAL 128      
978-723 A Maynard MA 7421 AT&T LOCAL 128      
978-899 A Littleton MA 7421 AT&T LOCAL 128      

Last updated: Sun, 10 Nov 2019 13:49:34 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.