iBasis, Inc.'s Board of Directors Receives from Royal KPN N.V. Notice of Intent to Commence Cash Tender Offer to Increase Equity Ownership to up to 100%

BURLINGTON, Mass.--(Business Wire)--
iBasis, Inc. (NASDAQ: IBAS), a leading wholesale carrier of international long
distance telephone calls and a provider of retail prepaid calling services and
enhanced services for mobile operators, announced today that its Board of
Directors has received a letter from Royal KPN N.V. indicating its intention to
commence a tender offer to increase KPN's equity ownership to up to 100% at an
offer price of $1.55 per share in cash. iBasis anticipates that its Board of
Directors will form a special committee of independent directors to consider the
matter.

KPN is the Company's largest stockholder, holding approximately 56% of the
Company`s outstanding stock. There can be no assurance that any transaction will
occur or, if a transaction occurs, what the structure or terms of such
transaction would be.

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, TDC and many other large
telecommunications carriers such as Verizon, Vodafone, China Mobile, China
Unicom, IDT, Qwest, Skype, Telecom Italia, Telefonica, and Yahoo. In 2008,
iBasis carried approximately 24 billion minutes of international voice traffic.
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.

The tender offer proposed by KPN referred to in this release has not commenced.
If and when commenced, iBasis will file with the Securities and Exchange
Commission a Solicitation/Recommendation Statement on Schedule 14D-9. iBasis
shareholders are advised to read iBasis`s Solicitation/ Recommendation Statement
on Schedule 14D-9 if and when it becomes available because it will contain
important information. Shareholders may obtain a free copy of the
Solicitation/Recommendation Statement on Schedule 14D-9 (if and when it becomes
available), as well as any other documents filed by iBasis in connection with
the tender offer by KPN, if and when it is commenced, free of charge at the
SEC`s website at http://www.sec.gov.

Safe Harbor Statement

Except for historical information, all of the expectations, plans and
assumptions contained in the foregoing press release constitute forward-looking
statements under Section 21E of the Securities Exchange Act of 1934 and involve
risks and uncertainties that could cause results to vary materially.For a
description of certain of these risks and uncertainties please read the
Company's most recent Annual Report on Form 10-K and other periodic and current
reports, all of which are available at www.sec.gov. Such forward-looking
statements are only as of the date they are made, and we have no current
intention to update any forward-looking statements.

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

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

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