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: 346

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
508-346 A Franklin MA   7135 TC SYSTEMS, INC. 128      
508-346 2 Franklin MA   145J TERRA NOVA TELECOM INC. 128   2025-08-29   
508-346 3 Franklin MA NWTNMAWAVMD  318J COMCAST IP PHONE, LLC 128      
508-346 6 Franklin MA BSTPMALLOMD  073H TELNYX LLC 128   2024-04-14   

Last updated: Mon, 15 Sep 2025 02:24:40 UTC

Sponsored by: LES.NET

Like this site? We accept donations via PayPal.