AS59
University of Wisconsin Madison
Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
- Baseline (neutral) 65
- Academic allocation +6
- Trust score 71 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
About University of Wisconsin–Madison
The University of Wisconsin–Madison is a public land-grant research university in Madison, Wisconsin, United States. It was founded in 1848 when Wisconsin achieved statehood and is the flagship campus of the University of Wisconsin System.
Network profile
Source: PeeringDB →Present at 1 internet exchange: MadIX
AS59 — global IP footprint
Cities where AS59 has measurable IPv4 allocation. Click any dot to open that city's page. Size and color scale with IP count.
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 128.104.0.0/15 | 131.1K |
18.4%
|
University of Wisconsin Madison | US | Wisconsin | Madison |
| 72.33.0.0/16 | 65.5K |
1.1%
|
University of Wisconsin Madison | US | Wisconsin | Madison |
| 144.92.0.0/16 | 65.5K |
23.8%
|
University of Wisconsin Madison | US | Wisconsin | Madison |
| 146.151.0.0/16 | 65.5K |
40.9%
|
University of Wisconsin Madison | US | Wisconsin | Sun Prairie |
| 205.213.248.0/22 | 1.0K |
0.2%
|
University of Wisconsin Madison | US | — | — |
| 198.51.246.0/23 | 512 |
0.0%
|
University of Wisconsin Madison | US | — | — |
| 198.133.224.0/23 | 512 |
0.8%
|
University of Wisconsin Madison | US | — | — |
| 192.12.220.0/24 | 256 |
0.0%
|
University of Wisconsin Madison | US | Pennsylvania | Reading |
| 192.12.223.0/24 | 256 |
0.0%
|
University of Wisconsin Madison | US | — | — |
| 192.12.224.0/24 | 256 |
0.0%
|
University of Wisconsin Madison | US | — | — |
| 192.86.79.0/24 | 256 |
0.0%
|
University of Wisconsin Madison | US | — | — |
| 198.51.254.0/24 | 256 |
0.8%
|
University of Wisconsin Madison | US | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS59 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.
| Prefix | Announcement samples | Last seen |
|---|---|---|
| 198.133.225.0/24 | 6,535 | 2026-07-24 05:01:52 |
| 198.51.254.0/24 | 6,423 | 2026-07-24 05:01:52 |
| 72.33.0.0/16 | 5,673 | 2026-07-24 05:01:52 |
| 128.105.0.0/16 | 5,664 | 2026-07-24 05:01:52 |
| 205.213.248.0/22 | 5,619 | 2026-07-24 05:01:52 |
| 198.133.224.0/24 | 5,615 | 2026-07-24 05:01:52 |
| 128.104.0.0/16 | 5,601 | 2026-07-24 05:01:52 |
| 146.151.0.0/16 | 5,584 | 2026-07-24 05:01:52 |
| 144.92.0.0/16 | 5,579 | 2026-07-24 05:01:52 |
| 192.86.79.0/24 | 5,505 | 2026-07-24 05:01:52 |
| 192.12.220.0/24 | 5,494 | 2026-07-24 05:01:52 |
| 198.51.247.0/24 | 5,479 | 2026-07-24 05:01:52 |
| 198.51.246.0/24 | 5,479 | 2026-07-24 05:01:52 |
| 192.12.223.0/24 | 5,448 | 2026-07-24 05:01:52 |
| 192.12.224.0/24 | 5,435 | 2026-07-24 05:01:52 |
| 128.105.218.0/23 | 4,134 | 2026-05-29 17:10:50 |
| 128.105.68.0/23 | 147 | 2026-07-23 09:35:43 |
Frequently Asked Questions
What is AS59?
AS59 is an Autonomous System Number assigned to University of Wisconsin Madison. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).
How many IP addresses does AS59 announce?
AS59 announces 331.0K IPv4 addresses distributed across 12 routed CIDR prefixes. The network is registered in United States.
Who operates AS59?
AS59 is operated by University of Wisconsin Madison. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS59 registered in?
AS59 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
