INTERXION HOLDING NV (NYSE:INXN), a leading European provider of carrier-neutral colocation data centre services, today announced the opening of initial phases of new data centres in Paris and London. Interxion has opened its seventh data centre in Paris (PAR 7). The first 500 square metres (sqm) of equipped space and 0.5 MW of customer power became available for customer installations in June. An additional 1,500 sqm will come on line by the end of September 2012 with the remaining space of 2,500 sqm coming on line through March 2013. The data centre is designed to support continuous customer loads in excess of 2 kVA per sqm. Interxion has also opened its second data centre in London (LON 2). The first 500 sqm and 0.75 MW of power became available for customer installations in early July. An additional 400 sqm is scheduled to be available in August and the remaining 700 sqm will come on line by year end 2012. The space is designed to support continuous customer loads of up to 2.5 kVA per sqm. About Interxion Interxion (NYSE:INXN) is a leading provider of carrier-neutral colocation data centre services in Europe, serving over 1,200 customers through 31 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 more than 400 carriers and ISPs and 18 European Internet exchanges across its footprint, Interxion has created content cloud, and connectivity hubs that foster growing customer communities of interest. For more information, please visit www.interxion.com. Forward-Looking Statements This press release contains forward-looking statements that involve risks and uncertainties. Actual results may differ materially from expectations discussed in such forward-looking statements. Factors that might cause such differences include, but are not limited to, the difficulty of reducing operating expenses in the short term, inability to utilise the capacity of newly planned data centres and data centre expansions, significant competition, the cost and supply of electrical power, data centre industry over-capacity, performance under service level agreements and other risks described from time to time in Interxion's filings with the Securities and Exchange Commission. Interxion does not assume any obligation to update the forward-looking information contained in this press release.