Interxion Schedules Second Quarter 2011 Earnings Announcement

Interxion Holding N.V. (NYSE: INXN), a leading European provider of colocation data centre services, will release its second quarter 2011 results at 7:00 a.m. Eastern Time (12:00 noon GMT) on Wednesday, 17 August 2011, and will host a conference call at 8:30 a.m. ET to discuss the results.

To participate on this call, U.S. callers may dial toll free 1-866-966-9439; callers outside the U.S. may dial direct [phone]. The conference ID for this call is 88641994. This event also will be webcast live over the Internet in listen-only mode at investors.interxion.com.

A replay of this call will be available shortly after the call concludes and will be available until 24 August 2011. To access the replay, U.S. callers may dial toll free 1866 247 4222; callers outside the U.S. may dial direct [phone]. The replay access number is 88641994#.

About Interxion

Interxion (NYSE: INXN) is a leading provider of carrier-neutral colocation data centre services in Europe, serving over 1,100 customers through 28 data centres in 11 European countries. Interxion’s uniformly designed, energy-efficient data centres offer customers extensive security and uptime for their mission-critical applications. With connectivity provided by 350 carriers and ISPs and 20 European Internet exchanges across its footprint, Interxion has created content and connectivity hubs that foster growing customer communities of interest. For more information, please visit www.interxion.com.