Server Colocation

The service brings together everything you need for the smooth operation of your server - space in server cabinet, reserved power supply, precision cooling, internet connection, protection against DDoS attacks and IP addresses.


No need to visit the data center - send the equipment via a courier of your choice and we will do the entire initial installation and configuration at no extra charge. You do not need to provide us with any cables with it. We will take care of that!


As customers of the S3 Data Center, you have a free custom panel for secure connection to your IPMI server (KVM) and remote control. This way you have control and easily control the operation of your machines.


Our team of experienced engineers is available 24/7 to offer you remote hands and eyes for hardware problems or upgrades. We have a warehouse with spare parts for all popular (mass) server models.







With the Cross-Connect service you can connect directly to your chosen ISPs

In the S3 Data Center you can place your equipment in an individual cabinet

Choose a plan for your server or contact us for an individual offer

  1U 2U Custom Size
Price 49 EUR 59 EUR Оn request
Free 1 month test period*




Included 0.5 Amp power (230V)




Precise cooling: 22.0° temperature and 50% humidity




Included Premium IP transit 1 Gbps Shared 1 Gbps Shared on request
Free DDoS Protection




Dual-stack IP subnets 1 IPv4 + Unlimited* IPv6 1 IPv4 + Unlimited* IPv6 1 IPv4 + Unlimited* IPv6
Optional: BGP Session with AS44901 25 EUR per month 25 EUR per month 25 EUR per month
Free IPMI / OOB management port




Private VLAN between customer's equipment




White label Client panel for access to management port,
view network usage and server details




Remote Hands and Eyes support 30 min free of charge 30 min free of charge 30 min free of charge
Optional: Cross-connect to other member 15 EUR per month 15 EUR per month 15 EUR per month
Colocation in other data center in Sofia




24/7 access to the data center




Free initial installation and configuration




Warehouse with spare parts in the data center




Discount on 1 year prepay 10% 10% 10%

  *One time per customer
   *Up to /64 IPv6 subnet

  * Discount for colocation on more than one server

White Label

With us you have the opportunity to use the full White Label of your chosen service. We offer individual and safe conditions for resellers.
Through White Label, customers only see your name and recognize you as the only service provider.

We offer:

  • White Label on IP addresses
  • White Label on client panel
  • Ability to register your autonomous system (ripe / lir page)
  • Rental of IP addresses and placing your Whois information (ripe / lir our page)

Why colocate in S3C?

  • Designed and built according to the TIER III standard
  • Carrier-neutral data center
  • 24/7 technical support and monitoring
  • Own warehouse with spare parts for servers
  • Preferential prices of server components
  • Interconnection with other customers and operators
  • Free installation of server and telecommunication equipment
  • Free initial software installation and configuration
  • Free 30-day non-binding test period for all services


  • PCI DSS, ISO 9001 and ISO 27001 certified
  • 24/7 qualified technical support
  • Technical capacity for diagnostics and repair of server equipment
  • Opportunity for connection to other data centers in Sofia
  • Opportunity for colocation in our closet in other data centers in Sofia
  • Distance to the nearest airport: 4.5 km
  • Freight entrance and parking for customers
  • More than 5000U running servers!

Colocation parameters

  • Temperature: ~ 21.0˚C | Humidity: ~ 50.0%
  • High quality 48U cabinets with 90% door perforation
  • 50 cm double floor with a load of up to 1200 kg / m2
  • Possibility for up to 4 x 25A fuse on the cabinet
  • Individual online electricity meters for metering of electricity consumption
  • Providing Zero-U PDU power strips and cable arrangers
  • Colocation room available for Desktop and Mining equipment
  • Possibility for private cells and colocation halls


  • Strategic location between the other data centers
  • Three independent cable routes in the data center area
  • Triple reserved cable approaches to the building
  • Presence of all local telecom operators
  • Ability to build wireless connections
  • Own DWDM ring to other data centers

Electrical parameters

  • Main power supplies from two independent substations
  • Separate substations with 2 x 1000 kVA transformers
  • Reserved diesel generator 1000 kVA (N + 1)
  • Modular redundant UPS systems 230 / 400V
  • Separate electrical panels for different power supply groups (A + B)
  • Smart monitoring of power supplies


  • High-efficiency precision air conditioning (N + 1)
  • Hot and cold areas - possibility of cooling up to 12 kW per cabinet
  • Free cooling and indirect adiabatic cooling
  • Warehouse with spare parts for HVAC systems
  • Constant monitoring of temperature and humidity


  • Video surveillance of the collocation halls and the data center
  • NFC card access control system
  • 24/7 physical security of the perimeter around the data center
  • Fire alarm system with smoke and fire sensors
  • 24-hour authorized access for customers
  • Individual locks for each cabinet
  • Service Level Agreement (SLA) - 99.99%

Our customers