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: 666

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-666 A Brookline MA BSTPMALLDS3  892D ONVOY, LLC - MA 128      
857-666 0 Brookline MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2015-07-27   
857-666 1 Brookline MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2015-07-27   
857-666 2 Brookline MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2015-07-27   
857-666 3 Brookline MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2015-07-27   
857-666 4 Brookline MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2015-07-27   
857-666 5 Brookline MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2015-05-22   
857-666 6 Brookline MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2015-05-22   
857-666 7 Brookline MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2015-07-27   
857-666 8 Brookline MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2015-07-27   
857-666 9 Brookline MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2015-07-27   

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: Callcentric - VoIP Internet phone service

Like this site? We accept donations via PayPal.