0001047469-04-022076 Sample Contracts

Exhibit 99.1 IBASIS, INC. AND THE BANK OF NEW YORK, AS TRUSTEE INDENTURE DATED AS OF JUNE 18, 2004 6 3/4% CONVERTIBLE SUBORDINATED NOTES DUE 2009
Indenture • June 29th, 2004 • Ibasis Inc • Telephone communications (no radiotelephone) • New York
iBASIS, INC. AND
Registration Rights Agreement • June 29th, 2004 • Ibasis Inc • Telephone communications (no radiotelephone) • New York
by and among iBASIS, INC. and
Note Purchase Agreement • June 29th, 2004 • Ibasis Inc • Telephone communications (no radiotelephone)
2004 WARRANT AND REGISTRATION RIGHTS AGREEMENT DATED AS OF JUNE 18, 2004 WARRANT AND REGISTRATION RIGHTS AGREEMENT
Warrant and Registration Rights Agreement • June 29th, 2004 • Ibasis Inc • Telephone communications (no radiotelephone) • Massachusetts