Autonomous system
AS9947 KTC-AS-KR kt cloud Co., Ltd
Hosting APNIC Network Services
Summary
kt cloud Co., Ltd (KT IDC)
hosting legacy
AS9947 (KTC-AS-KR) is held by kt cloud Co., Ltd, the data-centre and cloud subsidiary spun out of KT Corporation (Korea Telecom). The company is Korea's largest colocation operator and runs the IDC estate historically known as KT-IDC, from offices on Hakdong-ro in Gangnam, Seoul.
What it's used for
The important thing about this card is the gap between the operator and the AS. kt cloud is a major national data-centre business, but AS9947 itself is tiny: RIS sees just 2 IPv4 prefixes — 61.100.71.0/24 and 61.100.72.0/24, 512 addresses in total — no IPv6, and 2 observed neighbours. That is not the routing footprint of Korea's biggest IDC provider; it is the footprint of one small, separately originated block.
The explanation is that the bulk of kt cloud's hosting and colocation address space is announced from KT's other, much larger ASNs, and AS9947 carries only a residual slice of it. Do not read the parent company's scale into this ASN. 61.100.x is legacy KT space, and the two /24s are consecutive — most likely a single IDC facility or one service's addresses that were given their own origin AS rather than folded into the main KT announcements.
Notable
- A textbook case of marketing and inventory disagreeing. The name promises a hyperscale cloud provider; the routing table shows 512 addresses. Both are true, because the AS is not where the company's traffic lives.
61.100.0.0space also appears under AS9952 (Hostway's Korean IDC), a reminder that this range was carved up among multiple Korean hosting operators.- kt cloud was separated from KT Corporation as its own company as part of KT's shift toward digital and cloud businesses.
This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy. Source, and how to suggest an edit.
Interconnection
Peering at a glance
Internet exchanges
No exchange port on file. Many exchanges publish no participant list, so this is not proof of absence.
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-29, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 2 prefixes · 512 addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| KR | Korea, Republic of | 2 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS9947- Registry name
- KTC-AS-KR-KR
- Abuse contact
- hostmaster@nic.or.kr
- Registered
- 2000-04-14
- Allocation
- allocated
Declared
PeeringDB profile
- Name
- kt cloud
- Also known as
- Korea Telecom IDC
- Network type
- Network Services
- Scope
- Asia Pacific
- Traffic ratio
- Balanced
- Peering policy
- Open
- IRR as-set
AS9947- Present at
- 1 exchanges
- Facilities
- 8 facilities
- Website
- https://www.kt-idc.com
PeeringDB records are maintained by the network operator and are not independently verified. Treat them as a statement of intent rather than of fact. For the observed and recorded view, see peering, which lists the exchanges Packet Clearing House has a port on file for.
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 2 with no ROA
- ROAs
- 0 authorising AS9947
- ASPA
- no ASPA record
- IRR
- 100% registered · 2 of 2 announcements
- Route objects
- 28 naming AS9947
Reputation
Classification and threat
Hosting Datacenter or cloud provider. Addresses are servers, not people.
Spamhaus DROP
Not on ASN-DROP The network as a whole is not listed.
No DROP prefixes None of its announced space is on the DROP prefix list.
Spamhaus DROP ("Don't Route Or Peer") lists space and networks run by, or hijacked for, spam and cybercrime operations: 448 networks and 1,849 prefixes, as published 2026-10-29. A short, high-confidence list, so a match is worth taking seriously, and absence from it says little on its own.
FBI IC3
No IC3 indicators Nothing from the FBI IC3 feed.
IC3 threat data is alpha. Absence of an indicator is not evidence of good behaviour, only of absence from this one feed.
Elsewhere