University of Wisconsin System
AS3128 is University of Wisconsin System (wisconsin.edu). It announces 655,616 IPv4 addresses in 12 prefixes, and 1 IPv6 prefixes.
United States· ARIN· allocated 1993-11-17· 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.
- United States655,616 · 100.00%
Registry record
Its ASN Whois record, as the registry publishes it.
- handle
- BRUWS-AS3128
- name
- University of Wisconsin System
- org
- BRUWS
- org name
- University of Wisconsin System
- org address
- 1220 Linden Drive, Madison, WI, 53705
- org city
- Madison
- org country
- US
- country
- US
- source
- arin
- created
- 1993-11-17
- updated
- 2018-03-07
- abuse name
- Network Operations Center
- abuse email
- noc@uwsys.net
- abuse phone
- +1-608-263-4188
- abuse kind
- role
- abuse city
- Madison
- abuse country
- US
- admin name
- Network Operations Center
- admin email
- noc@uwsys.net
- admin phone
- +1-608-263-4188
- admin kind
- role
- admin city
- Madison
- admin country
- US
- tech name
- Michael Hare
- tech email
- michael.hare@wisc.edu
- tech phone
- +1-608-262-5236
- tech kind
- person
- tech city
- Madison
- tech country
- US
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 IP180.00%
- geonode, anyip, thordata0.01%
- None here
- None here
- None here
- None here
- Hosting IP2560.04%
- None here
- None here
- None here
- 0.00%
- None here
- 0.00%
IPv4 prefixes
Every IPv4 prefix BGP Route saw it announce. A prefix another AS also announces says so.
| PREFIX | COUNTRY | RPKI | PEERS | FIRST SEEN |
|---|---|---|---|---|
| 131.210.0.0/16 | United States | valid | 20 | 2026-10-02 |
| 137.81.0.0/16 | United States | valid | 20 | 2026-10-02 |
| 137.104.0.0/16 | United States | valid | 20 | 2026-10-02 |
| 138.49.0.0/16 | United States | valid | 20 | 2026-10-02 |
| 138.49.160.0/22 | United States | valid | 20 | 2026-10-02 |
| 139.225.0.0/16 | United States | valid | 20 | 2026-10-02 |
| 141.233.0.0/16 | United States | valid | 20 | 2026-10-02 |
| 143.200.0.0/16 | United States | valid | 20 | 2026-10-02 |
| 143.235.0.0/16 | United States | valid | 20 | 2026-10-02 |
| 143.236.0.0/16 | United States | valid | 20 | 2026-10-02 |
| 144.13.0.0/16 | United States | valid | 20 | 2026-10-02 |
| 192.35.81.0/24 | United States | valid | 20 | 2026-10-02 |
IPv6 prefixes
Every IPv6 prefix BGP Route saw it announce.
| PREFIX | COUNTRY | RPKI | PEERS | FIRST SEEN |
|---|---|---|---|---|
| 2600:1d00::/28 | United States | valid | 20 | 2026-10-02 |
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