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 v1.1.0 — a transparent heuristic, not a definitive verdict. How it works →
About Michigan State University
Michigan State University is a public land-grant research university in East Lansing, Michigan, United States. It was founded in 1855 as the Agricultural College of the State of Michigan, the first of its kind in the country.
AS231 — global IP footprint
Cities where AS231 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 |
|---|---|---|---|---|---|---|
| 35.8.0.0/13 | 524.3K |
15.9%
|
Michigan State University | US | Michigan | East Lansing |
| 35.12.0.0/14 | 262.1K |
21.7%
|
Michigan State University | US | Michigan | East Lansing |
| 35.20.0.0/14 | 262.1K |
0.0%
|
Michigan State University | US | Michigan | East Lansing |
| 35.8.0.0/15 | 131.1K |
18.3%
|
Michigan State University | US | Michigan | East Lansing |
| 35.10.0.0/16 | 65.5K |
2.6%
|
Michigan State University | US | Michigan | East Lansing |
| 35.11.128.0/17 | 32.8K |
1.1%
|
Michigan State University | US | Michigan | Lansing |
| 35.11.0.0/18 | 16.4K |
0.6%
|
Michigan State University | US | Michigan | East Lansing |
| 35.11.96.0/19 | 8.2K |
0.0%
|
Michigan State University | US | — | — |
| 35.11.64.0/20 | 4.1K |
0.3%
|
Michigan State University | US | Michigan | Grand Ledge |
| 192.108.190.0/23 | 512 |
33.0%
|
Michigan State University | US | — | — |
| 192.108.188.0/24 | 256 |
49.6%
|
Michigan State University | US | — | — |
| 192.231.113.0/24 | 256 |
32.4%
|
Michigan State University | US | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS231 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 |
|---|---|---|
| 192.108.191.0/24 | 5,678 | 2026-07-19 22:07:36 |
| 192.108.188.0/24 | 5,670 | 2026-07-19 22:07:36 |
| 192.108.190.0/24 | 5,667 | 2026-07-19 22:07:36 |
| 192.231.113.0/24 | 5,657 | 2026-07-19 22:07:36 |
| 35.20.0.0/14 | 4,499 | 2026-07-19 22:07:39 |
| 35.8.0.0/13 | 4,480 | 2026-07-19 22:07:39 |
| 35.12.240.0/21 | 1,202 | 2026-07-19 20:51:54 |
Frequently Asked Questions
What is AS231?
AS231 is an Autonomous System Number assigned to Michigan State University. 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 AS231 announce?
AS231 announces 787.5K IPv4 addresses distributed across 12 routed CIDR prefixes. The network is registered in United States.
Who operates AS231?
AS231 is operated by Michigan State University. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS231 registered in?
AS231 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
