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: 617 [Rate centres in NPA 617] [Dial plan for NPA 617]

NXX: 329

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
617-329 A Winthrop MA STHMMAGBGT0  7619 RCN TELECOM SERVICES, INC. - MA 128      
617-329 0 Winthrop MA   829J PAETEC ITEL, LLC 128   2002-10-13   
617-329 1 Winthrop MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128   2008-12-06   
617-329 2 Winthrop MA STHMMAGBGT0  7619 RCN TELECOM SERVICES, INC. - MA 128      
617-329 3 Winthrop MA   829J PAETEC ITEL, LLC 128   2005-02-12   
617-329 4 Winthrop MA SOVLMAABDS2  268F PEERLESS NETWORK OF MASSACHUSETTS, LLC - MA 128   2002-06-16   
617-329 5 Winthrop MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128   2011-06-27   
617-329 6 Winthrop MA CMBRMAORDS0  7199 MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MA 128   2006-06-09   
617-329 7 Winthrop MA BSTPMALLDS3  892D ONVOY, LLC - MA 128   2010-03-15   
617-329 8 Winthrop MA STHMMAGBGT0  7619 RCN TELECOM SERVICES, INC. - MA 128      
617-329 9 Winthrop MA BSTNMABLOMD  990E BANDWIDTH.COM CLEC, LLC - MA 128   2010-02-19   

Last updated: Sat, 05 Apr 2025 03:03:23 UTC

Sponsored by: VoIP.ms

Like this site? We accept donations via PayPal.