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: 857 [Rate centres in NPA 857] [Dial plan for NPA 857]

NXX: 678

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-678 A Belmont MA BSTPMALLDS3  892D ONVOY, LLC - MA 128      
857-678 0 Belmont MA SOVLMAAB3MD  197D VONAGE AMERICA LLC 128      
857-678 1 Belmont MA BSTPMALLDS3  892D ONVOY, LLC - MA 128      
857-678 2 Belmont MA BSTPMALLDS3  892D ONVOY, LLC - MA 128      
857-678 3 Belmont MA BSTPMALLDS3  892D ONVOY, LLC - MA 128      
857-678 4 Belmont MA BSTPMALLDS3  892D ONVOY, LLC - MA 128      
857-678 5 Belmont MA BSTPMALLDS3  892D ONVOY, LLC - MA 128      
857-678 6 Belmont MA BSTPMALLDS3  892D ONVOY, LLC - MA 128      
857-678 7 Belmont MA BSTPMALLDS3  892D ONVOY, LLC - MA 128      
857-678 8 Belmont MA BSTPMALLDS3  892D ONVOY, LLC - MA 128      
857-678 9 Belmont MA BSTPMALLDS3  892D ONVOY, LLC - MA 128      

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

Sponsored by: FiberConX Communications Ltd.

Like this site? We accept donations via PayPal.