AS63798Industrial Cyber Security Center of Excellence
JapanRegistryAPNICAs of 27th September 2026, AS63798 (Industrial Cyber Security Center of…), a network registered in Japan with APNIC, originates 2 IPv4 prefixes covering 9.2k addresses and 2 IPv6 prefixes. By IPv4 address space that makes it the 11,000th-largest of the 79,525 networks we see originating IPv4, and the 325th-largest of 729 in Japan. It is seen behind 1 upstream network, most often AS2907 (Science Information Network), and in front of 8 downstream networks. None of its announcements have a valid RPKI ROA. 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 AS63798 is seen behind, one and two hops out, drawn from real AS paths.
Networks observed one and two hops upstream of AS63798 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
19
adjacent networks
- Upstreams
- 15%
- Peers
- 1053%
- Downstreams
- 842%
Networks carrying this one's traffic toward the rest of the internet.
| Network | Country | Relationship | Paths | Vantage pts |
|---|---|---|---|---|
| AS2907Science Information Network | JP | Peer | 1,098 | 145 |
Prefixes
The largest blocks AS63798 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 163.220.192.0/19 | 8.2k | 81/81 |
| 163.220.228.0/22 | 1k | 81/81 |
| 2401:5e40:c600::/39 | 33.6M × /64 | 64/64 |
| 2401:5e40:c100::/40 | 16.8M × /64 | 64/64 |
Routing health
How AS63798'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
- Valid0.0%0
- Invalid0.0%0
- No ROA100.0%4
Propagation
- Globally propagated90% of full-feed peers or more100.0%4
- Partially propagated40% to 90%0.0%0
- Seen by few peersUnder 40%0.0%0
Prefix sizes
IPv4 — 2 prefixes
IPv6 — 2 prefixes
- /3933.6M × /6450.0%1
- /4016.8M × /6450.0%1
Recent changes
Announcements that started or stopped since 28th Aug 2026.
No announcement by AS63798 started or stopped in this period.
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.