Press release

Interxion Schedules First Quarter 2019 Earnings Announcement

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Interxion Holding N.V. (NYSE: INXN), a leading European provider of
carrier and cloud-neutral colocation data centre services, will release
its first quarter 2019 results on Thursday, 9 May 2019, and will host a
conference call at 8:30 a.m. ET (1:30 p.m. GMT, 2:30 p.m. CET) to
discuss the results.

To participate on this call, U.S. callers may dial toll free
1-866-966-1396; callers outside the U.S. may dial direct +44 (0) 2071
928 000. The conference ID for this call is INXN. 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 23 May 2019. To access the replay, U.S.
callers may dial toll free 1-866-331-1332; callers outside the U.S. may
dial direct +44 (0) 3333 009 785. The replay access number is 7667705.

About Interxion

Interxion (NYSE: INXN) is a leading provider of carrier and
cloud-neutral colocation data centre services in Europe, serving a wide
range of customers through more than 50 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 over 700 connectivity providers, 21 European Internet
exchanges, and most leading cloud and digital media platforms across its
footprint, Interxion has created connectivity, cloud, content and
finance hubs that foster growing customer communities of interest. For
more information, please visit www.interxion.com.