AS131159 Yamagata University 🇯🇵 JP
Announcing 7 prefixes, seen at the RIS collectors.
IPv4 prefixes
6
123,392 (482 × /24)
IPv6 prefixes
1
1 × /48
Upstreams
2
transit providers observed
Peers
0
settlement-free adjacencies
Downstreams
0
transit customers observed
Customer cone
0
ASes reachable through it
Registry and operator data
- AS number
- AS131159
- Name
- Yamagata University
- Organisation
- Yamagata Univ
- Country
- 🇯🇵 JP
- RIR
- APNIC
- Allocated
- 2008-10-03
- Network type
- Educational/Research
- Traffic levels
- 1-5Gbps
- Scope
- Asia Pacific
- Peering policy
- Selective
- IRR as-set
- AS-YAMAGATAU
- Website
- https://www.yamagata-u.ac.jp/
- PeeringDB
- net/40020
- Exchanges
- 1
RPKI coverage of this AS
Its own announcements, validated against the current ROA set
Announced prefixes
7 in total
| Prefix | RPKI | Peers | Sample path | First seen |
|---|---|---|---|---|
| 133.24.0.0/16 v4 | RPKI valid | 43 | 380012907131159 | 2026-09-18 |
| 133.24.0.0/18 v4 | RPKI valid | 43 | 380012907131159 | 2026-09-18 |
| 133.24.64.0/18 v4 | RPKI valid | 43 | 176392907131159 | 2026-09-18 |
| 133.24.128.0/18 v4 | RPKI valid | 43 | 380012907131159 | 2026-09-18 |
| 133.24.192.0/19 v4 | RPKI valid | 43 | 380012907131159 | 2026-09-18 |
| 133.24.248.0/23 v4 | RPKI valid | 42 | 176392907131159 | 2026-09-18 |
| 2001:df0:25e::/48 v6 | RPKI valid | 33 | 176392907131159 | 2026-09-18 |