by: /s/ Ofer Gneezy ----------------------- Name: Ofer Gneezy Title: President & CEO KPN TELECOM, B.V., by: /s/ Elco Blok Dated: December 15, 2006 ------------------------ Name: Elco Blok Title: Member of the BoardShare Purchase and Sale Agreement • December 18th, 2006 • Ibasis Inc • Telephone communications (no radiotelephone) • New York
