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: 508 [Rate centres in NPA 508] [Dial plan for NPA 508]

NXX: 671

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
508-671 A Webster MA WBSTMANEDS0  9102 VERIZON NEW ENGLAND INC. 128      
508-671 0 Webster MA   9102 VERIZON NEW ENGLAND INC. 128      
508-671 1 Webster MA   9102 VERIZON NEW ENGLAND INC. 128      
508-671 2 Webster MA   9102 VERIZON NEW ENGLAND INC. 128      
508-671 3 Webster MA   9102 VERIZON NEW ENGLAND INC. 128      
508-671 4 Webster MA   9102 VERIZON NEW ENGLAND INC. 128      
508-671 5 Webster MA   9102 VERIZON NEW ENGLAND INC. 128      
508-671 6 Webster MA   9102 VERIZON NEW ENGLAND INC. 128      
508-671 7 Webster MA   892D ONVOY, LLC - MA 128   2012-03-05   
508-671 8 Webster MA   9102 VERIZON NEW ENGLAND INC. 128      
508-671 9 Webster 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.