Videsh Sanchar Bhavan at 1 CIT Road, Ultadanga, is Kolkata's international gateway building, and the data centre inside it has traded as STT Kolkata 1 since ST Telemedia and Tata Communications closed their Indian joint venture on 19 October 2016, with 74 per cent and 26 per cent respectively. Gateway heritage is what a tenant is paying for: 57 networks and five internet exchanges are reachable from the current site entry, and NIXI's Kolkata node occupies the same building, which matters to any regional ISP after settlement-free reach. A second, older entry for the address shows 42 networks and one exchange under the legacy Tata name; both describe the same floors, so the counts must never be added together. Neither a floor plate nor a power figure is published for Kolkata, and the single Indian certification STT GDC India holds from the Uptime Institute attests design documents at a Bengaluru building, so no Tier award attaches here. Sify and RailTel hold the city's other serious addresses.
Which company runs the Kolkata gateway data centre today?
STT Global Data Centres India, which took on the building when the ST Telemedia joint venture with Tata Communications completed on 19 October 2016.
Which building holds the Kolkata facility?
Videsh Sanchar Bhavan, 1 CIT Road, Ultadanga, Kolkata 700054 - the city's international gateway building.
Why do two different network counts appear for 1 CIT Road?
The address carries a legacy Tata entry showing 42 networks and one exchange alongside the current STT Kolkata 1 entry showing 57 networks and five. They are the same floors described twice, not two facilities.
Which exchange node sits inside the Kolkata building?
NIXI Kolkata, which puts the national exchange's regional node in the same building as the colocation floors.
What certification covers the Kolkata facility?
STT GDC India's only Uptime Institute award in India attests the design documents of Bengaluru DC 3; the Kolkata building carries no Tier certification of its own.