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: 302

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-302 A Boston MA   428H AIRUS, INC. - MA 128      
857-302 0 Boston MA   990E BANDWIDTH.COM CLEC, LLC - MA 128   2014-10-16   
857-302 1 Boston MA   428H AIRUS, INC. - MA 128   2014-10-04   
857-302 2 Boston MA   990E BANDWIDTH.COM CLEC, LLC - MA 128   2014-10-16   
857-302 3 Boston MA   990E BANDWIDTH.COM CLEC, LLC - MA 128   2014-10-16   
857-302 4 Boston MA   990E BANDWIDTH.COM CLEC, LLC - MA 128   2014-10-16   
857-302 5 Boston MA   990E BANDWIDTH.COM CLEC, LLC - MA 128   2014-10-16   
857-302 6 Boston MA   268F PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 128   2014-12-27   
857-302 7 Boston MA   990E BANDWIDTH.COM CLEC, LLC - MA 128   2015-05-15   
857-302 8 Boston MA   6889 OMNIPOINT MIAMI E LICENSE, LLC DBA T-MOBILE USA 128   2014-11-08   
857-302 9 Boston MA   6889 OMNIPOINT MIAMI E LICENSE, LLC DBA T-MOBILE USA 128   2014-11-08   

Last updated: Sat, 31 Oct 2020 19:28:10 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.