Stellanor London North

Stellanor London North is a large data centre 1km north of London's financial district, the City of London.

The data centre was run by Level 3, which was acquired by CenturyLink, which rebranded as Lumen. Lumen's EMEA companies were sold to Colt in 2023. Colt sold this data centre to Stellanor in 2025. 

hSo:wholesale services available at Stellanor London North

• Colocation
• IP Transit
• Data Centre Interconnects

Stellanor London North Miscellaneous Information

• Technical space arranged over seven floors
• Colocation Space: 12,212 sq m
• Total Physical Space: 25,143 sq m
• Maximum Site Power: 20 MVA

Power

• Mains Power: Dual redundant 20MVA, 33kV dedicated underground main feeds, 4 x 11kV supplies from ring supplied from 2 sub-stations.
• Generators: 4 (5 ultimate) x 4.3MVA and 2 x 2.0MVA diesel driven emergency power generators giving 21.2MVA. Automatic start in less than 1 minute to feed 100% of the facility. Generator fuel for 24-hour continuous operation at 100% load.
• UPS: 3 separate systems of 5 x 625kVA Hybrid Rotary UPS modules providing 2500kVA output each with N+1 redundancy. 1 system of 5 x 500kVA UPS modules providing 2000kVA total output with N+1 redundancy. Total facility UPS capacity: 9500kVA N+1. 15 minute battery autonomy per UPS module. Dual redundant A&B distribution strategy. Underfloor power track distribution system.

Environmental

• 750W/sq m average cooling capacity over the gross space
• Temperature regulated to below 26 degrees C
• Humidity regulated overall to 50%RH +/- 20%
• Technical areas positively pressurised to minimise dust ingress.

Physical

• Minimum floor to ceiling clearance: 2,570mm from top of raised floor
• 550mm average raised floor height, depending on floor
• Raised Floor Loading 14kN/sq m
• Structural Floor Slab: 21kN/sq m
• 2 goods lifts (maximum loads - 3,950kg & 4,400kg)

Fire Prevention

• Very Intelligent Early Warning (V.I.E.W.) detection above and below raised floor
• Smoke extract system at 12 air changes per hour
• Double interlocked pre-action dry pipe sprinkler system

Security

• Remote 24x7 security monitoring
• Full electronic access control system, based on proximity cards with photo and PIN keypads
• Biometric Palm-scanners in addition for Colocation Areas
• Locks on colocation suites and cabinets
• Intruder detection system on escape and riser doors
• CCTV monitoring and recording of all access points and circulation areas

Building Monitoring System (BMS)

• Location Operations and Control Centre
• Network monitoring system with critical alarm repeating to Regional Management Centre
• 24x7 local monitoring and logging of temperature and humidity conditions and alarms
• Full perimeter under-floor leak detection linked to building monitoring system

Telecoms Infrastructure

• Facility is designed to accommodate standard rack/cabinets of 2,200mm nominal height
• Power distributed under floor
• Fibre cabling distributed overhead within a managed containment system
• Copper cabling distributed overhead within a heavy duty racking system
• The building has three fibre access points

Address and Location