Autonomous system
AS9689 SKB-FCABLE-AS SK Broadband Co Ltd
Residential APNIC
Summary
SK Broadband
isp residential legacy
AS9689 (SKB-FCABLE-AS) is held by SK Broadband, Inc., one of South Korea's three major fixed-line broadband providers and a wholly owned subsidiary of SK Telecom. The company is the former Hanaro Telecom, which pioneered ADSL in Korea and was renamed after SK Telecom acquired it in 2008. The FCABLE handle points at the cable-broadband side of the estate rather than the operator's backbone.
What it's used for
This is consumer access space, and at scale: 164 IPv4 prefixes carrying 291,840 addresses, no IPv6, with only 2 observed BGP neighbours. That pairing is the whole story. Nearly 300,000 addresses would look like a mid-sized carrier on volume alone, but a carrier earns its volume by peering — hundreds of adjacencies, a customer cone beneath it. Two neighbours means this AS sells nothing downstream: it is a pool of subscriber addresses hanging off its parent's backbone.
The prefix list agrees. The inventory is built from large Korean access blocks — 124.254.128.0/17, 115.161.0.0/17, 223.131.0.0/17, 123.109.0.0/17, 112.212.0.0/17, 58.145.0.0/17 — then a long tail of /18s and /19s carved from those same ranges. Announcing a /17 alongside its own constituent /18s and /19s is how a broadband operator pins parts of an aggregate to regional aggregation points while keeping the covering route. That, plus the number of /17-scale blocks, is a residential network: pools handed to home lines, not server space.
Notable
- SK Broadband runs several ASNs; this is one part of the estate, not the whole operator.
- The two-neighbour figure is typical of a subsidiary eyeball AS whose transit is supplied in-group by its parent.
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, 1 downstream and 2 adjacent networks observed; most-used upstreams first.
| AS | Network | Paths seen |
|---|---|---|
| AS9318 | SK Broadband Co Ltd | 10,168 |
Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-11, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.
Address space
Summary
IPv4 152 prefixes · 214K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| KR | Korea, Republic of | 152 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS9689- Registry name
- SKB-FCABLE-AS-KR
- Abuse contact
- hostmaster@nic.or.kr
- Registered
- 1999-10-05
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 164 with no ROA
- ROAs
- 0 authorising AS9689
- ASPA
- no ASPA record
- IRR
- 100% registered · 164 of 164 announcements
- Route objects
- 3,693 naming AS9689
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: 432 networks and 1,768 prefixes, as published 2026-10-12. 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