asn.dev

Autonomous system

AS17857 SKB-NAKDONGDIGITALBUSANNET-AS-KR SK Broadband Co Ltd

Unclassified APNIC

IPv4 addresses 145K 152 prefixes
IPv6 prefixes 0 counted as prefixes, not addresses
Countries 1 mostly KR
Exchanges 0 recorded by PCH
Upstreams 1 0 downstream
Flagged prefixes 0 none

Summary

SK Broadband

Korea, Republic of · AI-generated

broadband residential korea cable

The AS handle SKB-NAKDONGDIGITALBUSANNET-AS-KR is held by SK Broadband Co Ltd.

What it's used for

  • The address space carries residential broadband traffic, indicated by the consistent netname broadNnet-KR across all sampled prefixes.
  • The AS announces 145408 IPv4 addresses across 152 prefixes while maintaining only 1 observed neighbour, a ratio characteristic of an access or eyeball network rather than a transit provider.

Notable

  • All registrants in the RDAP sample are IRT-KRNIC-KR, which aligns with the announcer SK Broadband Co Ltd.
  • The inventory consists entirely of IPv4 space with no IPv6 prefixes announced, reflecting a legacy or IPv4-centric deployment.
  • The address inventory is finely subdivided into numerous /20 and /21 blocks, suggesting site-by-site segmentation within the corporate estate.

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

Full topology · Graph

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.

ASNetworkPaths seen
AS9318SK Broadband Co Ltd15,128

Exchange presence is recorded rather than inferred: the directory collected by Packet Clearing House (https://www.pch.net/ixp/data) on 2026-10-14, licensed CC BY-NC-SA 3.0. Transit is inferred from observed BGP paths, never declared by either party.

Address space

Summary

Shape and geography

IPv4 152 prefixes · 145K addresses IPv6 0 prefixes

CountryNamePrefixes
KRKorea, Republic of152

Registry

Allocation record

APNIC · via Atlas (registry + RDAP)
Registry
APNIC
Handle
AS17857
Registry name
SKB-NAKDONGDIGITALBUSANNET-AS-KR-KR
Abuse contact
hostmaster@nic.or.kr
Registered
2001-07-24
Allocation
allocated

Routing security

RPKI and IRR

Full detail
RPKI
0% valid · 0 valid, 244 with no ROA
ROAs
0 authorising AS17857
ASPA
no ASPA record
IRR
100% registered · 244 of 244 announcements
Route objects
573 naming AS17857

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: 442 networks and 1,773 prefixes, as published 2026-10-13. 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

Cross-check