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: 663

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-663 A Dorchester MA   892D ONVOY, LLC - MA 128      
857-663 0 Dorchester MA BSTPMALLDS3  892D ONVOY, LLC - MA 128      
857-663 1 Dorchester MA   515J IP HORIZON LLC 128      
857-663 2 Dorchester MA CMBSMA01GT4  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128      
857-663 3 Dorchester MA BSTPMALLOMD  073H TELNYX LLC 128      
857-663 4 Dorchester MA   145J TERRA NOVA TELECOM INC. 128      
857-663 5 Dorchester MA   145J TERRA NOVA TELECOM INC. 128      
857-663 6 Dorchester MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128      
857-663 7 Dorchester MA BSTPMALLDS3  892D ONVOY, LLC - MA 128      
857-663 8 Dorchester MA BSTPMALLDS3  892D ONVOY, LLC - MA 128      
857-663 9 Dorchester MA SOVLMAABDS2  268F PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 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.