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: 997

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
857-997 A Somerville MA CMBRMABEQMD  321J HD CARRIER LLC 128      
857-997 0 Somerville MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128      
857-997 1 Somerville MA   321J HD CARRIER LLC 128      
857-997 2 Somerville MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128      
857-997 3 Somerville MA   515J IP HORIZON LLC 128      
857-997 4 Somerville MA CMBSMA01GT4  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128      
857-997 5 Somerville MA CMBRMABEQMD  321J HD CARRIER LLC 128      
857-997 6 Somerville MA CMBRMABEQMD  321J HD CARRIER LLC 128      
857-997 7 Somerville MA CMBRMABEQMD  321J HD CARRIER LLC 128      
857-997 8 Somerville MA NWTNMAWAVMD  318J COMCAST IP PHONE, LLC 128      
857-997 9 Somerville MA BSTPMALLDS3  892D ONVOY, LLC - MA 128      

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

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.