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: 239

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-239 A Boston MA BSTPMALLDS3  892D ONVOY, LLC - MA 128      
857-239 0 Boston MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128      
857-239 1 Boston MA BSTPMALLDS3  892D ONVOY, LLC - MA 128      
857-239 2 Boston MA BSTPMALLDS3  892D ONVOY, LLC - MA 128      
857-239 3 Boston MA BSTNMABODS2  9102 VERIZON NEW ENGLAND INC. 128      
857-239 4 Boston MA BSTNMABODS2  9102 VERIZON NEW ENGLAND INC. 128      
857-239 5 Boston MA BSTNMACOVMD  4084 PAETEC COMMUNICATIONS, INC. - MA 128      
857-239 6 Boston MA BSTNMABODS2  9102 VERIZON NEW ENGLAND INC. 128      
857-239 7 Boston MA BSTNMACOVMD  4084 PAETEC COMMUNICATIONS, INC. - MA 128      
857-239 8 Boston MA NWTNMAWAVMD  318J COMCAST IP PHONE, LLC 128      
857-239 9 Boston MA NWTNMAWAVMD  318J COMCAST IP PHONE, LLC 128      

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

Sponsored by: VoIP Much Phone Company

Like this site? We accept donations via PayPal.