iBasis CEO to Present at Kaufman Brothers and Cowen & Company Investor Events

Gneezy will Provide Updates on Company's Integration of KPN Global
Carrier Services and Progress on Acquisition Synergies
BURLINGTON, Mass.--(Business Wire)--
iBasis, Inc. (NASDAQ: IBAS), a KPN affiliate, today announced that
company President and CEO Ofer Gneezy will present at the Kaufman
Brothers Nex-Gen Infrastructure Tech & Services event on Thursday, May
22nd and at the Cowen & Company 20/20 TMT Conference on Thursday, May
29. Both conferences will be held in New York. A copy of the
presentation will be posted on May 22nd, and a webcast of the Cowen &
Company presentation will be accessible both live and archived on the
iBasis investor relations site at investor.ibasis.com.

Mr. Gneezy will provide an update on the company's successful
integration of the KPN Global Carrier Services business it acquired in
October 2007, including its achievement of synergies from the
transaction with Royal KPN, and discuss the company's growth strategy
for the future.

About the Conferences

The Kaufman Brothers Nex-Gen Infrastructure Tech & Services event
will be held May 22, 2008 at the W Hotel, 541 Lexington Avenue, New
York. For more information visit the Kaufman Brothers web site at
www.kbro.com.

The Cowen & Company 20/20 TMT Conference will be held May 28-30,
2008, at the New York Palace Hotel, 455 Madison Avenue, New York.
Cowen conferences are open to Cowen's institutional clients only.
Clients can contact Brian Perry at 617-946-3869 for conference
details. A live and archived webcast of Mr. Gneezy's presentation will
be available on the iBasis investor relations site at
http://investor.ibasis.com.

About iBasis

Founded in 1996, iBasis (NASDAQ: IBAS) is a leading wholesale
carrier of international long distance telephone calls and a provider
of retail prepaid calling services and enhanced services for mobile
operators. iBasis customers include KPN, KPN Mobile, E-Plus, BASE, and
many other large telecommunications carriers such as Verizon,
Vodafone, China Mobile, China Unicom, IDT, Qwest, Skype, Telecom
Italia, Telefonica, and Yahoo. In October 2007, iBasis acquired KPN
Global Carrier Services to create one of the three largest carriers of
international voice traffic in the world, and KPN became a majority
stockholder of iBasis. On a pro forma basis, the combined company
carried approximately 24 billion minutes of international voice
traffic in 2007. The Company can be reached at its worldwide
headquarters in Burlington, Mass., USA at +1 781-505-7500 or on the
Internet at www.ibasis.com.

iBasis is a registered trademark of iBasis, Inc. All other
trademarks are the property of their respective owners.

Various remarks that we may make about future expectations, plans,
and prospects for iBasis constitute forward-looking statements for
purposes of the safe harbor provisions under The Private Securities
Litigation Reform Act of 1995. Forward-looking statements include but
are not limited to statements regarding the amount and timing of
achievement of transaction synergies, anticipated costs and our
expectations regarding resumption of growth. Actual results may differ
materially from those indicated by these forward-looking statements as
a result of various important factors, including those discussed in
the Company's Form 10-K for the year ended December 31, 2007, and
other current and periodic reports on file with the SEC.

iBasis, Inc.
Media:
Chris Ward, 781-505-7557
or
Investors:
Richard Tennant, 781-505-7409

Copyright Business Wire 2008