Interxion to Build Sixth Data Centre in Amsterdam

15 November 2011

New Data Centre Adds 4,000 Square Metres Provides 10 MW of Customer Available Power

AMSTERDAM--Nov. 15, 2011-- INTERXION HOLDING NV (NYSE:INXN), a leading European provider of carrier-neutral colocation data centre services announced today, that in response to customer demand, it will build its sixth data centre (AMS6) in its Amsterdam campus area. The data centre will provide approximately 4,000 sqm of equipped space with 10 MW of customer available power and is scheduled to be completed in the fourth quarter of 2012. As of today, over 50% of the data centre has been sold.

“We are seeing significant demand in Amsterdam for carrier neutral colocation space, particularly among cloud service providers and digital media providers,” said David Ruberg, Interxion’s Chief Executive Officer. “By continuing to expand in this key market, we are demonstrating our commitment to support our customers' current and future growth plans."

This data centre’s state-of the-art design is environmentally friendly and provides high availability. The design includes innovative features such as aquifer thermal energy storage infrastructure and a highly efficient power topology to minimize the data centre’s carbon footprint.

The capital expenditures for AMS 6 are expected to total approximately €60M, which includes the purchase of the site. The Company’s 2011 CAPEX guidance of €140 to €160 million includes the forecasted 2011 spending for this new facility.

About Interxion
Interxion (NYSE: INXN) is a leading provider of carrier-neutral colocation data centre services in Europe, serving a wide range of 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 18 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 .

Jim Huseby, +1-813-644-9399
VP – Investor Relations