133.69.172.0/22
🇯🇵IPv4APNICannouncedAS45688UT-NSRG - The University of Tokyo Interfaculty Initiative in Information StudiesNo ROA
CIDR
133.69.172.0/22
IP Version
IPv4
Addresses
1K
Mask
/22 (255.255.252.0)
Country
🇯🇵 Japan
City
Chiyoda City
RIR
APNIC
Status
announced
Allocated
-
Announced BGP Routes
1 of 1 routeRPKI:
IRR:
| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 133.69.172.0/22 | AS45688UT-NSRG - The University of Tokyo Interfaculty Initiative in Information Studies | No ROA | — | 5/31/2026 |
Covering Prefix
1 less-specific announcement| Prefix | Origin AS | RPKI | IRR | Last Seen |
|---|---|---|---|---|
| 133.69.0.0/16 | AS2523ITRC-NET - Internet Technology Research Consortium | No ROA | — | 5/31/2026 |
Geolocation
API
Open https://api.ipctl.io/v1/prefix/133.69.172.0/22Returns prefix allocation, BGP routes, and more-specific subnets.
curl -s "https://api.ipctl.io/v1/prefix/133.69.172.0/22" | jq
External Links