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: 374

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-374 A Quincy MA BSTPMALLDS3  892D ONVOY, LLC - MA 128      
857-374 0 Quincy MA SOVLMAAB6MD  939H COMMIO, LLC 128   2021-10-11   
857-374 1 Quincy MA SOVLMAAB6MD  939H COMMIO, LLC 128   2021-10-11   
857-374 2 Quincy MA   892D ONVOY, LLC - MA 128   2024-02-25   
857-374 3 Quincy MA   892D ONVOY, LLC - MA 128   2024-02-25   
857-374 4 Quincy MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-08-14   
857-374 5 Quincy MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-08-14   
857-374 6 Quincy MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-08-14   
857-374 7 Quincy MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2021-08-14   
857-374 8 Quincy MA SOVLMAAB6MD  939H COMMIO, LLC 128   2021-10-11   
857-374 9 Quincy MA SOVLMAAB6MD  939H COMMIO, LLC 128   2021-10-11   

Last updated: Tue, 16 Apr 2024 01:38:01 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.