subnet.im

AS198840YUJUN KIM trading as ALCLOUD

South KoreaRegistryRIPE NCC

As of 26th September 2026, AS198840 (YUJUN KIM trading as ALCLOUD), a network registered in South Korea with RIPE NCC, originates 2 IPv4 prefixes covering 512 addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 48,553rd-largest of the 79,516 networks we see originating IPv4, and the 627th-largest of 908 in South Korea. It is seen behind 3 upstream networks, most often AS20200 (Hongshin, Inc.) and AS135120 (PROJECT ELIV). Every one of its announcements has a valid RPKI ROA, and none are RPKI-invalid. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

2

IPv6 prefixes

1

IPv4 addresses

512

IPv6 /64s

65.5k

Upstream graph

The networks AS198840 is seen behind, one and two hops out, drawn from real AS paths.

AS198840Toward the internet core
Upstream graph for AS198840: 8 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS198840YUJUN KIM trading…This networkAS20200Hongshin, Inc.AS20473The Constant Comp…AS135120PROJECT ELIVAS60068Datacamp Limited …AS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS137409GSL Networks Pty …AS199524Gcore S.A.

Networks observed one and two hops upstream of AS198840 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

5

adjacent networks

Upstreams
360%
Peers
240%
Downstreams
00%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS198840
NetworkCountryRelationshipPathsVantage pts
AS20200Hongshin, Inc.USPeer16281
AS135120PROJECT ELIVKRAdjacent4545
AS20473The Constant Company, LLCUSPeer1818

Prefixes

The largest blocks AS198840 originates, widest first.

Largest prefixes originated by AS198840
PrefixAddressesVisibility
142.249.58.0/2425681/81
169.40.51.0/2425681/81
2a06:9801:22f::/4865.5k × /6463/64

Routing health

How AS198840's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid100.0%3
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%3
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 2 prefixes

IPv6 — 1 prefixes

  • /4865.5k × /64100.0%1

Recent changes

Announcements that started or stopped since 28th Aug 2026.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.