AS131969Suzuyo Shinwart Corporation
JapanRegistryAPNICAs of 11th November 2026, AS131969 (Suzuyo Shinwart Corporation), a network registered in Japan with APNIC, originates 3 IPv4 prefixes covering 2k addresses and 3 IPv6 prefixes. By IPv4 address space that makes it the 25,847th-largest of the 80,747 networks we see originating IPv4, and the 472nd-largest of 737 in Japan. It is seen behind 3 upstream networks, most often AS2519 (ARTERIA Networks Corporation) and AS17676 (SoftBank Corp.). 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
IPv6 prefixes
IPv4 addresses
IPv6 /64s
Upstream graph
The networks AS131969 is seen behind, one and two hops out, drawn from real AS paths.
Networks observed one and two hops upstream of AS131969 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
8
adjacent networks
- Upstreams
- 338%
- Peers
- 563%
- Downstreams
- 00%
Networks carrying this one's traffic toward the rest of the internet.
| Network | Country | Relationship | Paths | Vantage pts |
|---|---|---|---|---|
| AS2519ARTERIA Networks Corporation | JP | Peer | 246 | 134 |
| AS17676SoftBank Corp. | JP | Peer | 162 | 105 |
| AS35280F5 Networks SARL |  FR | Peer | 6 | 2 |
Prefixes
The largest blocks AS131969 originates, widest first.
| Prefix | Addresses | Visibility |
|---|---|---|
| 133.88.20.0/22 | 1k | 76/76 |
| 133.88.20.0/23 | 512 | 76/76 |
| 133.88.22.0/23 | 512 | 76/76 |
| 2405:25c0:a200::/40 | 16.8M × /64 | 62/63 |
| 2405:25c0:a2f1::/48 | 65.5k × /64 | 62/63 |
| 2405:25c0:a2f2::/48 | 65.5k × /64 | 62/63 |
Routing health
How AS131969'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%6
- Invalid0.0%0
- No ROA0.0%0
Propagation
- Globally propagated90% of full-feed peers or more100.0%6
- Partially propagated40% to 90%0.0%0
- Seen by few peersUnder 40%0.0%0
Prefix sizes
IPv4 — 3 prefixes
IPv6 — 3 prefixes
- /4016.8M × /6433.3%1
- /4865.5k × /6466.7%2
Recent changes
Announcements that started or stopped since 12th Oct 2026.
No announcement by AS131969 started or stopped in this period.
Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.