Autonomous system
AS9569 HCNSEOCHOCATV-AS-KR SEOCHO CABLE SYSTEMS CO., LTD.
Residential APNIC
Summary
HCN Seocho Broadcasting (Seocho Cable Systems)
isp residential legacy
AS9569 (HCNSEOCHOCATV-AS-KR) is registered to Seocho Cable Systems Co., Ltd., the cable system operator trading as HCN Seocho Broadcasting, serving Seoul's Seocho District. HCN is a Korean cable MSO that sells digital cable TV, broadband internet and VoIP to households; it was acquired by KT Skylife in September 2021 (the former Hyundai HCN).
What it's used for
This is an eyeball access network, and the routing evidence says so plainly. RIS observes 77 IPv4 prefixes carrying 58,368 addresses and only one BGP neighbour. Tens of thousands of addresses behind a single upstream is the classic signature of a consumer access network: it originates a large pool of subscriber addressing, buys transit from one provider, and peers with nobody because it has no wholesale business to peer for. A transit carrier of the same size would show hundreds of neighbours. The address pool itself is fragmented in the way cable operators' pools usually are, with two large blocks (203.170.96.0/19 and 203.170.112.0/20) alongside a long tail of /21s and /22s pulled from unrelated ranges such as 1.222.128.0/18, 110.35.128.0/21, 27.35.24.0/21 and 120.50.84.0/22. That accretion pattern is what happens when a subscriber base grows past its original allocation and the operator draws further blocks from the national registry over time.
Notable
- The announced footprint is larger than a single Seoul district would imply, which is consistent with the AS carrying more of the HCN cable estate than its name suggests.
- HCN Seocho has operated as a regional broadcaster and cable provider since the mid-1990s, and community and public-service programming remains part of its licence obligations alongside the broadband product.
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.
Transit providers
1 upstream, 0 downstream and 1 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS7562 | HCN Dongjak | 4,999 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-25, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 47 prefixes · 56.32K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| KR | Korea, Republic of | 47 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS9569- Registry name
- HCNSEOCHOCATV-AS-KR-KR
- Abuse contact
- hostmaster@nic.or.kr
- Registered
- 1999-07-21
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 306 with no ROA
- ROAs
- 0 authorising AS9569
- ASPA
- no ASPA record
- IRR
- 95% registered · 290 of 306 announcements 2 other origin
- Route objects
- 104 naming AS9569
Reputation
Classification and threat
Residential Fixed-line consumer ISP. Addresses here are homes.
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: 443 networks and 1,779 prefixes, as published 2026-10-24. 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