• Hemel Hempstead 3 Data Center

Our Hemel Hempstead 3 Data Center is located in Hemel Hempstead, a town located 24 miles northwest of London, in Hertfordshire, and is part of the Greater London Urban Area. It has attracted many businesses due to its proximity to London and excellent connectivity links, with easy access to the UK motorway network and London airports. Our Hemel Hempstead 3 Data Center is a 45-minute drive from Heathrow International Airport, and a 50-minute drive from central London. The data center provides 8,960 sqm of IT space and a maximum of 20 MW critical IT load. As well as being connected to other NTT data centers, the facility is also connected to major carrier hubs in both Slough and the Docklands which has been established as the UK’s internet hub and the backbone for the global internet network, which facilitates the majority of the London Internet Exchange (LINX). 

At a glance: Hemel Hempstead Data Center

Power supply:

  • Dual dedicated 11,000V (HV) grid connections (2n)
  • Dedicated 2n redundant HV substations on-site
  • Minimum n+n (UPS) with battery back-up
  • Back-up generators
  • Maximum IT load of 20 MW


  • 24/7 on-site security
  • 3.6m SEAP certified security fence with electrified topper
  • Proximity cards to authorize access levels including man trap access
  • Biometric identification

Technical operations:

  • Monitoring of all critical infrastructure by own operation staff on-site
  • Standardized operation processes with amplified technical systems redundancy in order to ensure maximum reliability


  • Carrier-neutral
  • Carrier mix from global tier 1 supplier to regional supplier 
  • Redundant Carrier-Meet-Me-Rooms (CMMR)
  • Redundant cabling infrastructure with diverse paths
  • Pre-cabling to support fast cross connect deployments
  • Inter DC connectivity between NTT data centers for geo-redundant solutions
  • Multi cloud interconnection platform to connect our clients to major cloud service providers such as Amazon Web Services (AWS), Microsoft Azure, and Google Cloud Platform

About Us

Global Data Centers is a division of NTT Ltd. and incorporates e-shelter, Gyron, Netmagic, NTT Indonesia Nexcenter, RagingWire and other NTT Communications group Data Center divisions. Our combined global platform is one of the largest in the world, with over 160 data centers spanning more than 20 countries and regions including North America, Europe, Africa and APAC. As a neutral operator, we offer access to multiple cloud providers, a large variety of Internet Exchanges and telecommunication network providers including our own IPv6 compliant, tier-one global IP network. Our clients benefit from tailored infrastructure and experience, consistent with best practices in design and operations, across all of our highly reliable, scalable, and customizable data centers.

Regional Contacts

Americas (RagingWire): +1 916 286 3000 
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EMEA (e-shelter / Gyron): +49 69 7801 2190
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India (Netmagic): +1 800 103 3130
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