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: 508 [Rate centres in NPA 508] [Dial plan for NPA 508]

NXX: 857

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
508-857 A Brockton MA NWTNMAWAVMD  318J COMCAST IP PHONE, LLC 128      
508-857 0 Brockton MA NWTNMAWAVMD  318J COMCAST IP PHONE, LLC 128   2006-02-09   
508-857 1 Brockton MA NWTNMAWAVMD  318J COMCAST IP PHONE, LLC 128      
508-857 2 Brockton MA NWTNMAWAVMD  318J COMCAST IP PHONE, LLC 128      
508-857 3 Brockton MA NWTNMAWAVMD  318J COMCAST IP PHONE, LLC 128      
508-857 4 Brockton MA NWTNMAWAVMD  318J COMCAST IP PHONE, LLC 128   2006-02-09   
508-857 5 Brockton MA NWTNMAWAVMD  318J COMCAST IP PHONE, LLC 128      
508-857 6 Brockton MA CMBSMA01AMD  4036 NEW CINGULAR WIRELESS PCS, LLC - DC 128   2008-10-28   
508-857 7 Brockton MA BRTNMACRLMD  5562 METROPCS, INC. 128   2007-10-11   
508-857 8 Brockton MA BRTNMACRLMD  5562 METROPCS, INC. 128   2007-10-11   
508-857 9 Brockton MA BRTNMACRLMD  5562 METROPCS, INC. 128   2007-10-11   

Last updated: Sun, 26 Jan 2025 15:59:20 UTC

Sponsored by: Execulink Telecom

Like this site? We accept donations via PayPal.