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: 856

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-856 A Cambridge MA BSTPMALLDS3  892D ONVOY, LLC - MA 128      
857-856 0 Cambridge MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128      
857-856 1 Cambridge MA NRTNMAAACM4  6889 OMNIPOINT MIAMI E LICENSE, LLC 128      
857-856 2 Cambridge MA BSTNMACOVMD  4084 PAETEC COMMUNICATIONS, INC. - MA 128      
857-856 3 Cambridge MA BSTNMACOVMD  4084 PAETEC COMMUNICATIONS, INC. - MA 128      
857-856 4 Cambridge MA BSTNMACOVMD  4084 PAETEC COMMUNICATIONS, INC. - MA 128      
857-856 5 Cambridge MA BSTPMALLDS3  892D ONVOY, LLC - MA 128      
857-856 6 Cambridge MA BSTPMALLDS3  892D ONVOY, LLC - MA 128      
857-856 7 Cambridge MA BSTPMALLDS3  892D ONVOY, LLC - MA 128      
857-856 8 Cambridge MA BSTPMALLDS3  892D ONVOY, LLC - MA 128      
857-856 9 Cambridge MA   515J IP HORIZON LLC 128      

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

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.