South Korea / Facility
용산 DC · 용산 IDC · KT DX IDC Yongsan
Operational hyperscale colocation facility in Seoul, opened by KT in November 2020 and currently marketed by kt cloud. UPS capacity and receiving-power expansion potential are separate disclosures; current IT load remains unknown. Historical expansion is retained within this facility.
Site / building photo
Yongsan IDC entrance shown in Electronic Times' 2020-11-11 report; capture date undisclosed.
Published date unknown · Captured date unknown · Checked 2026-10-07
Research-selected property image; reviewer must confirm site identity, suitability and rights before publication.
www.etnews.com · Source and attribution ↗Electronic Times article identifies the facility entrance. Individual photographer attribution and reusable license were not established; permission required before import. Publication and capture dates were not independently established.
PeeringDB facility geocode associated with the corroborated street address; Google Maps and property-marker alignment could not be inspected. Not surveyed or block-verified.. Coordinate precision: approximate. Street-map detail does not increase the accuracy of the sourced point.
Loading local map…
Statements retain their dates, definitions and development scope. Do not add these rows together.
| Claim / measurement | Scope and status | As of | Evidence and accounting |
|---|---|---|---|
| ≈40.8 MW Unspecified power | Yongsan facility aggregate UPS nameplate capacity, N+1 configuration Operational · cumulative | 2026-10-07 | Reported claim ↗ Excluded from capacity totals. As_of is retrieval date of an undated operator page. Converted from approximately 40,800 kW. Redundant UPS capacity does not establish usable IT load or total facility demand. |
| 400 MW Grid connection | Yongsan receiving-power expansion potential upper limit Planned · cumulative | 2026-10-07 | Reported claim ↗ Excluded from capacity totals. As_of is retrieval date of an undated page. Source says expansion is possible up to 400 MW; this is an upper-limit potential, not a committed project, current connection or IT load. |
Opening date stated in the KT-supplied announcement caption; some contemporary reporting describes operations beginning November 5.
Supporting source ↗3Q22 investor presentation targeted completion through Q2 2023 and referred to 38.5 MW upon completion. Actual completion and power basis remain unresolved.
Supporting source ↗kt cloud announced a Yongsan public cloud zone operated with Cheonan CDC for resilience; this is a service zone within the facility.
Supporting source ↗Capacity disclosure; installed or occupied rack count unknown.
Source ↗Operator claims approximately 20% cooling-power savings; measured operating performance unavailable.
Source ↗3Q22 presentation; unspecified power basis and unclear cumulative/incremental meaning. No full publication date established, so excluded from dated capacity_claims. Do not add to UPS or grid figures.
Source ↗Accommodation potential rather than actual installed servers.
Source ↗Announcement describes flexible low/high-density zones; current rack density distribution unknown.
Source ↗Cloud connectivity does not prove named cloud providers are tenants.
Source ↗Historical on-site report, not current post-expansion inventory.
Source ↗2020 reporting; current configuration and fuel endurance not independently confirmed.
Source ↗Operator-published Yongsan contact; no contact attempted.
Source ↗Source attribution does not imply independent verification or permission to reuse images.
Published Date unavailable · Retrieved 2026-10-07
Names Yongsan as a Seoul hyperscale DC; lists approximately 40,800 kW aggregate UPS capacity in N+1 configuration, approximately 5,000 racks, seven above-ground and six underground floors, dual 154 kV supply and receiving-power expansion potential up to 400 MW.
Published 2020-11-18 · Retrieved 2026-10-07
KT-supplied announcement identifies KT DX IDC Yongsan in Seoul, Korea, opened November 4; reports 48,000 square metres, capacity for over 100,000 servers, flexible 4–15 kW zones and HCX connectivity.
Published Date unavailable · Retrieved 2026-10-07
Lists kt cloud organization, 33 Wonhyo-ro 41-gil, Wonhyoro 3-Ga, Yongsan-gu, Seoul 04363, country KR and geocode 37.535381, 126.958805. Record shows update timestamp 2025-11-30; this is not a publication or survey date.
Published Date unavailable · Retrieved 2026-10-07
PDF pages 20 and 36 associate the named 2018 KT Yongsan IDC new-build construction project with 33 Wonhyo-ro 41-gil, Yongsan-gu, Seoul, Wonhyoro 3-ga. Used for address corroboration only.
Published Date unavailable · Retrieved 2026-10-07
Page 13 targets Yongsan IDC expansion through Q2 2023 and states 38.5 MW secured upon completion; power basis and incremental versus total interpretation are not specified.
Published 2023-10-30 · Retrieved 2026-10-07
Operator announcement describes an established public cloud zone at Yongsan operated alongside Cheonan CDC for disaster recovery. Search-accessible text was available, but direct open returned no readable body.
Published Date unavailable · Retrieved 2026-10-07
Describes customer ICT equipment accommodation, power, cooling, security and backbone connectivity; service-level certification references are not treated as Yongsan-specific certifications.
Published 2020-11-11 · Retrieved 2026-10-07
On-site report locates the facility at the former KT Wonhyo telephone office, describes leased space for unnamed global customers and a planned PUE of 1.4. Exterior photograph credited to reporter Kim Na-in.
Published 2020-11-11 · Retrieved 2026-10-07
Reports eight server rooms, six-metre room height, dual feeds from Mapo and Yongsan substations and backup generation designed for up to 48 hours. Shows facility entrance photograph.
Published Date unavailable · Retrieved 2026-10-07
Yongsan IDC entrance shown in Electronic Times' 2020-11-11 report; capture date undisclosed. Original image: https://img.etnews.com/photonews/2011/1354723_20201111182503_267_0003.jpg
Name: kt cloud — Yongsan DC facility introduction; kt cloud Yongsan — PeeringDB
Aliases: kt cloud — Yongsan DC facility introduction; S. Korea's KT Corp.'s New Data Center to Lead Digital Transformation — KT release; kt cloud establishes public dedicated cloud zone at Yongsan IDC
Kind: kt cloud — Yongsan DC facility introduction; S. Korea's KT Corp.'s New Data Center to Lead Digital Transformation — KT release
Country: S. Korea's KT Corp.'s New Data Center to Lead Digital Transformation — KT release; kt cloud Yongsan — PeeringDB
Region: kt cloud Yongsan — PeeringDB; Ministry of Employment and Labor Notice No. 2022-567 — KOSHA-hosted disclosure
City: kt cloud — Yongsan DC facility introduction; kt cloud Yongsan — PeeringDB; Ministry of Employment and Labor Notice No. 2022-567 — KOSHA-hosted disclosure
Metro: S. Korea's KT Corp.'s New Data Center to Lead Digital Transformation — KT release
Address: kt cloud Yongsan — PeeringDB; Ministry of Employment and Labor Notice No. 2022-567 — KOSHA-hosted disclosure
Operator: kt cloud — Yongsan DC facility introduction; kt cloud Yongsan — PeeringDB; kt cloud establishes public dedicated cloud zone at Yongsan IDC
Business Model: kt cloud — Colocation services; Metro Seoul — Visit to KT Yongsan IDC
Scale: kt cloud — Yongsan DC facility introduction
Statuses: kt cloud — Yongsan DC facility introduction; kt cloud establishes public dedicated cloud zone at Yongsan IDC
Location: kt cloud Yongsan — PeeringDB; Ministry of Employment and Labor Notice No. 2022-567 — KOSHA-hosted disclosure
Summary: kt cloud — Yongsan DC facility introduction; S. Korea's KT Corp.'s New Data Center to Lead Digital Transformation — KT release; KT 3Q22 NDR presentation; kt cloud establishes public dedicated cloud zone at Yongsan IDC; Metro Seoul — Visit to KT Yongsan IDC
Stable identifier: 0b08b48d-8dfa-4637-89a2-97b03e674ab9