Network · AS231

AS231 Michigan State University

AS231 (Michigan State University) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS231

OwnerMichigan State University
KindInternet service provider
Servers, not peopleno
IPv4 addresses783,360
IPv4 ranges11
IPv6 ranges16

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

35.20.0.0/14
35.12.0.0/14
35.8.0.0/15
35.10.0.0/16
35.11.128.0/17
35.11.0.0/18
35.11.96.0/19
35.11.64.0/20
192.108.190.0/23
192.231.113.0/24
192.108.188.0/24

Ranges and owner from DB-IP (CC BY 4.0), updated 2026-10-21.

Check an IP address →

Detect it in code

Spot AS231 traffic at signup.

Send the visitor's IP. The response includes the ASN, the owner and flags.hosting.

curl https://veqen-app.com/v1/ip/check \
  -H "Authorization: Bearer $VEQEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"ip": "203.0.113.7"}'

import os, requests

r = requests.post(
    "https://veqen-app.com/v1/ip/check",
    headers={"Authorization": f"Bearer {os.environ['VEQEN_API_KEY']}"},
    json={"ip": "203.0.113.7"},
    timeout=10,
)
result = r.json()
print(result["risk"]["verdict"], result["risk"]["reasons"])

const res = await fetch("https://veqen-app.com/v1/ip/check", {
  method: "POST",
  headers: {
    Authorization: `Bearer ${process.env.VEQEN_API_KEY}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({"ip": "203.0.113.7"}),
});
const result = await res.json();
console.log(result.risk.verdict, result.risk.reasons);

Questions

About AS231

Is AS231 a datacenter or VPN network?

AS231 (Michigan State University) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS231?

AS231 is registered to Michigan State University. It announces about 783,360 IPv4 addresses.

How do I detect traffic from AS231?

Call the Veqen IP check with the visitor's address. The response includes the ASN, the owner and whether the network is a datacenter, VPN network, relay or ISP.