subnet.im

AS213471YAMAMOTO Hiroshi

JapanRegistryRIPE NCC

As of 27th September 2026, AS213471 (YAMAMOTO Hiroshi), a network registered in Japan with RIPE NCC, originates 5 IPv6 prefixes. It is seen behind 4 upstream networks, most often AS215467 (Skhron OU) and AS63798 (Industrial Cyber Security Center of…). 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

5

IPv4 addresses

0

IPv6 /64s

8.4M

Upstream graph

The networks AS213471 is seen behind, one and two hops out, drawn from real AS paths.

AS213471Toward the internet core
Upstream graph for AS213471: 10 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS213471YAMAMOTO HiroshiThis networkAS9663OTO GKAS63798Industrial Cyber …AS214481Wojciech Czapkowi…AS215467Skhron OUAS7719ITSUDATTEAS30058FDCservers.netAS2907Science Informati…AS50917Diederik Focko de…AS6939Hurricane Electri…AS208453Johan Karlsson (S…

Networks observed one and two hops upstream of AS213471 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

9

adjacent networks

Upstreams
444%
Peers
556%
Downstreams
00%

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

Upstreams of AS213471
NetworkCountryRelationshipPathsVantage pts
AS215467Skhron OUEEPeer12563
AS63798Industrial Cyber Security Center of ExcellenceJPPeer6464
AS214481Wojciech CzapkowiczPLPeer6363
AS9663OTO GKJPPeer6363

Prefixes

The largest blocks AS213471 originates, widest first.

Largest prefixes originated by AS213471
PrefixAddressesVisibility
2a06:41:80::/424.2M × /6463/64
2a06:41::/441M × /6463/64
2a06:41:10::/441M × /6463/64
2a06:41:20::/441M × /6462/64
2a06:41:70::/441M × /6464/64

Routing health

How AS213471'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%5
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%5
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv6 — 5 prefixes

  • /424.2M × /6420.0%1
  • /441M × /6480.0%4

Recent changes

Announcements that started or stopped since 28th Aug 2026.

  • Withdrawn2a06:41:60::/4425th Sept 2026
  • Announced2a06:41:70::/4424th Sept 2026
  • Announced2a06:41:60::/4422nd Sept 2026
  • Withdrawn2a06:41:30::/4421st Sept 2026
  • Withdrawn2a06:41:80::/4121st Sept 2026
  • Withdrawn2a0b:4e07:d7::/4821st Sept 2026

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