AS37917 University of Tsukuba 🇯🇵 JP
Announcing 3 prefixes, seen at the RIS collectors.
IPv4 prefixes
3
132,096 (516 × /24)
IPv6 prefixes
0
-
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
- AS37917
- Name
- University of Tsukuba
- Organisation
- University of Tsukuba
- Country
- 🇯🇵 JP
- RIR
- APNIC
- Allocated
- 2006-01-30
RPKI coverage of this AS
Its own announcements, validated against the current ROA set
Announced prefixes
3 in total
| Prefix | RPKI | Peers | Sample path | First seen |
|---|---|---|---|---|
| 130.158.0.0/16 v4 | no ROA | 43 | 17639290737917 | 2026-09-18 |
| 133.51.0.0/16 v4 | no ROA | 43 | 17639290737917 | 2026-09-18 |
| 163.220.252.0/22 v4 | no ROA | 43 | 17639290737917 | 2026-09-18 |