subnet.im

AS152865Tokyo University of Technology Linux Club

JapanRegistryAPNIC

As of 27th September 2026, AS152865 (Tokyo University of Technology Linux…), a network registered in Japan with APNIC, originates 1 IPv4 prefix covering 512 addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 48,558th-largest of the 79,525 networks we see originating IPv4, and the 590th-largest of 729 in Japan. It is seen behind 1 upstream network, most often AS59105 (Home NOC Operators Group). 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

1

IPv6 prefixes

1

IPv4 addresses

512

IPv6 /64s

262k

Upstream graph

The networks AS152865 is seen behind, one and two hops out, drawn from real AS paths.

AS152865Toward the internet core
Upstream graph for AS152865: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS152865Tokyo University …This networkAS59105Home NOC Operator…AS2518BIGLOBE Inc.AS9370SAKURA Internet I…

Networks observed one and two hops upstream of AS152865 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

2

adjacent networks

Upstreams
150%
Peers
150%
Downstreams
00%

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

Upstreams of AS152865
NetworkCountryRelationshipPathsVantage pts
AS59105Home NOC Operators GroupJPPeer145145

Prefixes

The largest blocks AS152865 originates, widest first.

Largest prefixes originated by AS152865
PrefixAddressesVisibility
160.187.26.0/2351281/81
2406:7ec0:1008::/46262k × /6464/64

Routing health

How AS152865'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%2
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%2
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 1 prefixes

IPv6 — 1 prefixes

  • /46262k × /64100.0%1

Recent changes

Announcements that started or stopped since 28th Aug 2026.

No announcement by AS152865 started or stopped in this period.

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