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: 774 [Rate centres in NPA 774] [Dial plan for NPA 774]

NXX: 566

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
774-566 A Grafton MA SOVLMAAB6MD  939H COMMIO, LLC 128      
774-566 0 Grafton MA SOVLMAAB6MD  939H COMMIO, LLC 128      
774-566 1 Grafton MA SOVLMAAB6MD  939H COMMIO, LLC 128      
774-566 2 Grafton MA SOVLMAAB6MD  939H COMMIO, LLC 128      
774-566 3 Grafton MA SOVLMAAB6MD  939H COMMIO, LLC 128      
774-566 4 Grafton MA SOVLMAAB6MD  939H COMMIO, LLC 128      
774-566 6 Grafton MA SOVLMAABBMD  145J TERRA NOVA TELECOM INC. 128      

Last updated: Wed, 20 Nov 2024 21:20:06 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.