AS45688 The University of Tokyo Interfaculty Initiative in Information Studies
AS45688 is operated by The University of Tokyo Interfaculty Initiative in Information Studies and registered with APNIC (JP) since 2009-04-02.
It announces 5 IPv4 and 0 IPv6 prefixes, 0% of them RPKI valid.
RIPE RIS sees 1 upstream and peer networks and 0 downstream networks next to it.
| Name | The University of Tokyo Interfaculty Initiative in Information Studies |
|---|---|
| Registry handle | UT-NSRG |
| Registry (RIR) | APNIC |
| Country | Japan (JP) |
| Delegated on | 2009-04-02 |
| Prefixes (IPv4 / IPv6) | 5 / 0 |
| RPKI valid | 0% (0 / 5) |
| Upstreams and peers | 1 |
| Downstream networks | 0 |
Routing health
- AS45688 announces 5 IPv4 and 0 IPv6 prefixes.
- No IPv6 prefixes announced.
- 5 announced prefixes are not covered by a ROA of AS45688 (they may have none, or another network’s).
- One upstream or peer seen (AS2907): an outage there takes the whole network off the internet.
For every check with the fix (IRR route objects, the RPKI state of each route, reverse DNS and the registration), run the full network report.
Announced prefixes 5
- 133.69.160.0/22
- 133.69.168.0/22
- 133.69.172.0/22
- 133.69.176.0/24
- 133.69.184.0/24
Upstreams and peers 1
The networks RIPE RIS sees next to AS45688 in BGP paths, the most visible first.
More about AS45688
Sources: RIR delegation data and PeeringDB (updated daily); routing from RIPEstat (RIPE NCC RIS and RPKI), refreshed daily. Routing data from 2026-11-14 10:35 UTC. The country is where the AS number was registered, not necessarily where the network operates.