iBasis, Inc. (IBAS) President and CEO to Ring the NASDAQ Stock Market Closing Bell

Company Celebrates Listing


MEDIA ADVISORY, July 10, 2006 (PRIMEZONE) --



 What:
 Ofer Gneezy, President & CEO of iBasis, Inc. (IBAS)
 will preside over the closing bell to celebrate its
 listing on the NASDAQ.

 Where:
 NASDAQ MarketSite - 4 Times Square - 43rd & Broadway - Broadcast Studio

 When:
 Tuesday July 11th, 2006 at 4:00 p.m. EDT

 Contacts:
 Jeff Miller
 Davies Murphy Group
 (781) 418-2429
 jmiller@daviesmurphy.com

 NASDAQ MarketSite:
 Stephanie Lowenthal; (646)441-5220

Feed Information:

The closing bell is available from 3:50 p.m. to 4:05 p.m. on uplink IA-6 C-band/transponder 17. The downlink frequency is 4040 Vertical; Audio 6.2-6.8. The feed can also be found on Waterfront fiber 1623. If you have any questions, please contact Stephanie Lowenthal at (646) 441-5220.

Photos:

To obtain a hi-resolution photograph of the Market Close, please go to http://www.nasdaq.com/reference/marketsite_events.stm and click on the market close of your choice.

About iBasis, Inc. (IBAS):

Founded in 1996, iBasis (Nasdaq:IBAS) is one of the largest carriers of international phone calls in the world. Using its global voice-over-Internet-protocol (VoIP) infrastructure and the Internet, iBasis is an integral player in the growth of Internet calling services from emerging providers like Yahoo! and Skype. The company recently announced an agreement with the Dutch national carrier Royal KPN N.V. to combine KPN Global Carrier Services into iBasis. Upon completion of the transaction later this year, iBasis will be one of the five largest international wholesale carriers in the world, having grown its international voice traffic from zero to the size of AT&T's international traffic in just 10 years.