The University of Tokyo
AS2501 is The University of Tokyo. It announces 200,704 IPv4 addresses in 4 prefixes, and 2 IPv6 prefixes.
Japan· APNIC· allocated 2002-04-05· education
Where its space is
The IPv4 it announces that IP Geolocation places, by country. A /24 counts for the AS announcing most of it.
- Japan200,704 · 100.00%
Registry record
Its ASN Whois record, as the registry publishes it.
- handle
- UTnet
- name
- The University of Tokyo
- country
- JP
- source
- jpnic
- updated
- 2014-03-19
- descr
- The University of Tokyo
- admin
- MN010JP
- tech
- MN010JP|YS7474JP
What the databases see
Addresses each address-keyed database holds in the IPv4 it announces, as a share of that space, with its largest providers. Counts overlap.
- VPN IP216alliedtelesis, vpngate0.11%
- proxyseller, anyip, geonix0.01%
- None here
- None here
- None here
- None here
- Hosting IP10,4965.23%
- None here
- None here
- None here
- SSH IP5100.25%
- SMTP IP280.01%
- 0.05%
IPv4 prefixes
Every IPv4 prefix BGP Route saw it announce. A prefix another AS also announces says so.
| PREFIX | COUNTRY | RPKI | PEERS | FIRST SEEN |
|---|---|---|---|---|
| 130.69.0.0/16 | Japan | not found | 19 | 2026-10-02 |
| 133.11.0.0/16 | Japan | not found | 19 | 2026-10-02 |
| 157.82.0.0/16 | Japan | not found | 19 | 2026-10-02 |
| 192.51.208.0/20 | Japan | not found | 19 | 2026-10-02 |
IPv6 prefixes
Every IPv6 prefix BGP Route saw it announce.
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