AS24287National Institute of Informatics
JapanRegistryAPNICAs of 26th September 2026, AS24287 (National Institute of Informatics), a network registered in Japan with APNIC, originates 1 IPv4 prefix covering 256 addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 59,114th-largest of the 79,480 networks we see originating IPv4, and the 639th-largest of 729 in Japan. It is seen behind 3 upstream networks, most often AS2907 (Science Information Network) and AS24490 (Trans-Eurasia Information Network…), and in front of 2 downstream networks. 50% of its announcements have 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
IPv6 prefixes
IPv4 addresses
IPv6 /64s
Upstream graph
The networks AS24287 is seen behind, one and two hops out, drawn from real AS paths.
Networks observed one and two hops upstream of AS24287 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
- 333%
- Peers
- 444%
- Downstreams
- 222%
Networks carrying this one's traffic toward the rest of the internet.
| Network | Country | Relationship | Paths | Vantage pts |
|---|---|---|---|---|
| AS2907Science Information Network | JP | Peer | 145 | 145 |
| AS24490Trans-Eurasia Information Network (TEIN2) - SG |  CN | Peer | 5 | 1 |
| AS7660Asia Pacific Advanced Network - Japan | JP | Peer | 1 | 1 |
Prefixes
The largest blocks AS24287 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 192.50.12.0/24 | 256 | 81/81 |
| 2001:df0:46::/48 | 65.5k × /64 | 64/64 |
Routing health
How AS24287'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
- Valid50.0%1
- Invalid0.0%0
- No ROA50.0%1
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
- /4865.5k × /64100.0%1
Recent changes
Announcements that started or stopped since 27th Aug 2026.
No announcement by AS24287 started or stopped in this period.
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.