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: 644

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
508-644 A Assonet MA ASNTMAMARP0  9102 VERIZON NEW ENGLAND INC. 128      
508-644 0 Assonet MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128   2002-03-27   
508-644 1 Assonet MA CMBRMAORDSG  4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2006-01-27   
508-644 2 Assonet MA ASNTMAMARP0  9102 VERIZON NEW ENGLAND INC. 128      
508-644 3 Assonet MA ASNTMAMARP0  9102 VERIZON NEW ENGLAND INC. 128      
508-644 4 Assonet MA NWTNMAWAVMD  318J COMCAST IP PHONE, LLC 128   2015-08-20   
508-644 5 Assonet MA ASNTMAMARP0  9102 VERIZON NEW ENGLAND INC. 128      
508-644 6 Assonet MA CMBRMAORDSG  4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2007-10-26   
508-644 7 Assonet MA NWTNMAWAVMD  318J COMCAST IP PHONE, LLC 128   2002-05-08   
508-644 8 Assonet MA CMBRMAORDSG  4018 LEVEL 3 COMMUNICATIONS, LLC - MA 128   2004-09-02   
508-644 9 Assonet MA ASNTMAMARP0  9102 VERIZON NEW ENGLAND INC. 128      

Last updated: Fri, 22 Mar 2024 03:02:44 UTC

Sponsored by: ISP Telecom

Like this site? We accept donations via PayPal.