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:

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-957 A Boston MA   756G WIDE VOICE, LLC - MA 128      
857-957 0 Boston MA   6101 COMCAST PHONE OF MASSACHUSETTS, INC. - MA 128   2015-08-24   
857-957 1 Boston MA   756G WIDE VOICE, LLC - MA 128   2014-11-21   
857-957 2 Boston MA   892D ONVOY, LLC - MA 128   2015-07-27   
857-957 3 Boston MA   7199 MCI WORLDCOM COMMUNICATIONS, INC. - MA 128   2015-07-08   
857-957 4 Boston MA   892D ONVOY, LLC - MA 128   2015-07-27   
857-957 5 Boston MA   892D ONVOY, LLC - MA 128   2015-07-27   
857-957 6 Boston MA   892D ONVOY, LLC - MA 128   2015-07-27   
857-957 7 Boston MA   892D ONVOY, LLC - MA 128   2015-07-27   
857-957 8 Boston MA   966G LOCAL ACCESS LLC - MA 128   2016-06-26   
857-957 9 Boston MA   892D ONVOY, LLC - MA 128   2015-07-27   

Last updated: Tue, 31 Dec 2019 02:37:20 UTC

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.