AS37917
University of Tsukuba
AS37917 is University of Tsukuba. It announces 132,096 IPv4 addresses in 3 prefixes, and 0 IPv6 prefixes.
Japan· APNIC· allocated 2006-01-30· education
132,096
IPv4 addresses announced
3
IPv4 prefixes
0
IPv6 prefixes
0.00%
of its routes RPKI-valid
132,096
of its IPv4 geolocated
1
country
Where its space is
The IPv4 it announces that IP Geolocation places, by country. A /24 counts for the AS announcing most of it.
- Japan132,096 · 100.00%
Registry record
Its ASN Whois record, as the registry publishes it.
- handle
- UTINS
- name
- University of Tsukuba
- country
- JP
- source
- jpnic
- updated
- 2007-06-11
- descr
- University of Tsukuba
- admin
- KI7984JP
- tech
- AM1479JP|AS3586JP|KK6630JP
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 IP420.03%
- proxyseller, flameproxies, floppydata0.01%
- None here
- None here
- None here
- None here
- Hosting IP5,3764.07%
- None here
- None here
- None here
- SSH IP4310.33%
- SMTP IP1080.08%
- 0.08%
IPv4 prefixes
Every IPv4 prefix BGP Route saw it announce. A prefix another AS also announces says so.
| PREFIX | COUNTRY | RPKI | PEERS | FIRST SEEN |
|---|---|---|---|---|
| 130.158.0.0/16 | Japan | not found | 19 | 2026-10-02 |
| 133.51.0.0/16 | Japan | not found | 19 | 2026-10-02 |
| 163.220.252.0/22 | Japan | not found | 19 | 2026-10-02 |
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