ZURICH 22 February 2011 - INTERXION HOLDING NV, (NYSE: INXN), a leading European provider of carrier-neutral colocation data centre services, has completed the second of three phased expansions to its ZUR1 data centre in Zurich-Glattbrugg, in response to consistent growth in customer demand. 640m2 of new data centre space was created in the expansion, which increases total data centre space to over 4000m2.

The new space provides an energy-efficient, secure, standards-based environment for housing customer equipment, with free air cooling, 2N UPS and N+1 backup generators providing up to 99.999% availability. In-house connectivity options include over 30 carriers and ISPs, as well as SwissIX, the leading neutral Swiss Internet exchange. The facility and its operational systems have been independently assessed and accredited for the ISO 27001 and BS25999 standards for information security and business continuity. ZUR1 also complies with the FINMA-RS 08/7 [Swiss Financial Markets Authority] directive.

"Through this sustained expansion programme, we are in a position to enable the most advanced, high-density, high-performance applications, giving our customers complete confidence that their infrastructure is both state-of-the-art and scalable," said Eddy Van den Broeck, Managing Director, Interxion Switzerland. "We now offer up to 2.5 kVA per square metre at our facilities, and this allows us to provide high-density racks with extremely high power supplies and performance in the smallest possible space."

"Interxion's steadily expanding data centre is a significant part of the infrastructure that makes Zurich such an important European Internet and data traffic hub," said Thomas Wagner, CEO of WAGNER AG (www.wagner.ch), the leading Swiss IT outsourcer and one of the first Interxion customers to install equipment in the new space. "Interxion's Zurich data centre is the only facility that can meet our stringent requirements in terms of power supply and air conditioning, and its leading-edge technology ensures that we can meet and exceed our customers' requirements."