AS9526 — KOSCOM-AS-KR KOSCOM

AS9526 announces 37 IPv4 prefixes covering 23,040 addresses and 0 IPv6 prefixes.

About this network

AS9526 (KOSCOM-AS-KR) is held by Koscom, the Korea Securities Computing Corporation — the financial-IT utility that supplies the technology backbone of Korea's capital markets. Koscom runs trading systems for the Korea Exchange, market-data distribution, and network and data-centre services for securities firms.

What it's used for

The routing evidence shows a service provider, not an end-site. RIS sees 44 IPv4 prefixes totalling 23,040 addresses, no IPv6, and 5 observed neighbours. The inventory splits cleanly in two. There is a core of large blocks — 114.31.112.0/21, 114.31.120.0/21, 211.255.192.0/21, 211.255.200.0/21, 39.125.128.0/21, plus /22s at 221.168.32.0, 103.244.108.0 and 128.134.148.0 — which is the operator's own infrastructure and data-centre space. Then there is a long tail of single /24s drawn from many unrelated parent ranges (123.141.x, 121.141.x, 118.37.x, 112.172.x, 1.254.x, 203.246.x, 211.169.x, 59.15.x, 211.175.x).

That tail is the signature of a shared-infrastructure operator: a /24 apiece, from whichever provider originally assigned it, announced from Koscom's AS because the customer's systems now sit in Koscom's facilities. With only five neighbours it is not a transit carrier — the customers are colocated and connected, not routed through.

Notable

• Koscom sits under the Ministry of Economy and Finance and the Korea Exchange, so it is closer to market infrastructure than to a commercial hosting company, even though its routing looks like one.
• Part of the legacy 128.134.0.0/16 Korean class-B appears here as a /22; a /24 from the same range is announced separately by AS9525, a brokerage — the same old block, split among the industry it was allocated to.
• No IPv6 announced.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 1.209.90.0/23
• 1.209.92.0/24
• 1.254.228.0/24
• 39.125.128.0/21
• 58.123.17.0/24
• 58.124.249.0/24
• 58.124.250.0/24
• 59.15.30.0/24
• 103.244.108.0/22
• 112.166.143.0/24
• 112.172.179.0/24
• 114.31.112.0/20
• 115.89.12.0/24
• 118.37.63.0/24
• 121.141.60.0/24
• 121.141.229.0/24
• 123.141.73.0/24
• 128.134.148.0/22
• 175.197.165.0/24
• 183.102.77.0/24
• 203.246.173.0/24
• 203.246.174.0/23
• 210.108.26.0/23
• 210.108.137.0/24
• 210.123.14.0/24
• 210.207.195.0/24
• 211.169.8.0/24
• 211.169.225.0/24
• 211.175.81.0/24
• 211.175.82.0/24
• 211.200.21.0/24
• 211.255.192.0/20
• 220.76.239.0/24
• 221.147.83.0/24
• 221.151.180.0/24
• 221.168.32.0/21
• 222.108.70.0/24

Upstream networks

• AS4766 Korea Telecom
• AS9318 SK Broadband Co Ltd
• AS3786 LG DACOM Corporation

Downstream networks

• AS9525 DB Securities Co.,Ltd.
• AS9961 KoreaFederationOfSavingsBanks

Adjacent networks

• AS4766 Korea Telecom
• AS9318 SK Broadband Co Ltd
• AS3786 LG DACOM Corporation
• AS9525 DB Securities Co.,Ltd.
• AS9961 KoreaFederationOfSavingsBanks

Routing security

• RPKI: 0 valid, 0 invalid and 54 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 87% of announcements registered; 77 route objects.
• Listed in as-sets: AS-DACOM, AS-GLOBEINTERNET-CLIENTS, AS-GLOBEINTERNET-CLIENTS, AS-HANARO, AS-HURRICANE, AS-IIJ, AS-KINX-TRANSIT, AS-KORNETBGP, AS-SKBROADBAND, AS-XO-B, AS2497:AS-IIJ.