subnet.im

AS204185Yuchen Ma

ChinaRegistryRIPE NCCTypeEyeball

As of 12th November 2026, AS204185 (Yuchen Ma), an access network registered in China with RIPE NCC, originates 17 IPv6 prefixes. It is seen behind 3 upstream networks, most often AS6939 (Hurricane Electric LLC) and AS38008 (Aperture Science Limited). 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

0

IPv6 prefixes

17

IPv4 addresses

0

IPv6 /64s

1.1M

Upstream graph

The networks AS204185 is seen behind, one and two hops out, drawn from real AS paths.

AS204185Toward the internet core
Upstream graph for AS204185: 9 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS204185Yuchen MaThis networkAS6939Hurricane Electri…AS20473The Constant Comp…AS38008Aperture Science …AS20130Depaul UniversityAS132337AxclusiveAS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS3356Lumen (Level 3)AS3491PCCW Global (HK) …

Networks observed one and two hops upstream of AS204185 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

6

adjacent networks

Upstreams
350%
Peers
350%
Downstreams
00%

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

Upstreams of AS204185
NetworkCountryRelationshipPathsVantage pts
AS6939Hurricane Electric LLCUSPeer68242
AS38008Aperture Science LimitedHKPeer24615
AS20473The Constant Company, LLCUSPeer1269

Prefixes

The largest blocks AS204185 originates, widest first.

Largest prefixes originated by AS204185
PrefixAddressesVisibility
2602:feda:2a0::/4865.5k × /6462/64
2602:feda:2a1::/4865.5k × /6462/64
2602:feda:2a2::/4865.5k × /6462/64
2602:feda:2a3::/4865.5k × /6462/64
2602:feda:2a4::/4865.5k × /6462/64
2602:feda:2a5::/4865.5k × /6462/64
2602:feda:2a6::/4865.5k × /6462/64
2602:feda:2aa::/4865.5k × /6462/64
2602:feda:2af::/4865.5k × /6462/64
2a0b:4340:400::/4865.5k × /6462/64

Routing health

How AS204185'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%17
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%17
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv6 — 17 prefixes

  • /4865.5k × /64100.0%17

Recent changes

Announcements that started or stopped since 13th Oct 2026.

No announcement by AS204185 started or stopped in this period.

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