Exhibit 4.4 IBASIS, INC. AND THE BANK OF NEW YORK, AS TRUSTEE INDENTURE DATED AS OF ___ ___, 2004 6 3/4% CONVERTIBLE SUBORDINATED NOTES DUE 2009Ibasis Inc • May 14th, 2004 • Telephone communications (no radiotelephone) • New York
Company FiledMay 14th, 2004 Industry Jurisdiction