Autonomous system
AS23563 SKB-VITSSEN-SUWON-AS-KR SK Broadband Co Ltd
Unclassified APNIC
Summary
SK Broadband
cable isp residential korea
The AS handle SKB-VITSSEN-SUWON-AS-KR is held by SK Broadband Co Ltd.
What it's used for
- The address space carries residential broadband traffic, evidenced by the netname
broadNnet-KRassigned to all sampled prefixes. - The AS announces 209 IPv4 prefixes totaling 203776 addresses, with only 1 observed neighbour, indicating a large access network rather than a transit provider.
Notable
- All registrants in the RDAP sample are
IRT-KRNIC-KR, which aligns with the SK Broadbrand identity as a major South Korean ISP. - The address inventory is heavily concentrated in the 218.209.0.0/19 block, with numerous /20 and /21 subdivisions across 114.29.0.0/16, 114.108.0.0/16, 121.254.0.0/16, and 27.119.0.0/16.
- The AS was first seen in RIS in 2005, reflecting its long-standing operation in the South Korean market.
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 |
|---|---|---|
| AS9318 | SK Broadband Co Ltd | 12,152 |
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 209 prefixes · 204K addresses IPv6 0 prefixes
| Country | Name | Prefixes |
|---|---|---|
| KR | Korea, Republic of | 209 |
Registry
Allocation record
- Registry
- APNIC
- Handle
AS23563- Registry name
- SKB-VITSSEN-SUWON-AS-KR-KR
- Abuse contact
- hostmaster@nic.or.kr
- Registered
- 2002-12-24
- Allocation
- allocated
Routing security
RPKI and IRR
- RPKI
- 0% valid · 0 valid, 196 with no ROA
- ROAs
- 0 authorising AS23563
- ASPA
- no ASPA record
- IRR
- 100% registered · 196 of 196 announcements
- Route objects
- 610 naming AS23563
Reputation
Classification and threat
Unclassified Not in the curated lists. Most of the ~80,000 allocated ASNs are not.
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: 431 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