Network · AS5661

AS5661 UNIVERSITY OF SOUTH FLORIDA

AS5661 (UNIVERSITY OF SOUTH FLORIDA) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS5661

OwnerUNIVERSITY OF SOUTH FLORIDA
KindInternet service provider
Servers, not peopleno
IPv4 addresses65,536
IPv4 ranges1
IPv6 ranges1

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

131.247.0.0/16

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

Check an IP address →

Detect it in code

Spot AS5661 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 AS5661

Is AS5661 a datacenter or VPN network?

AS5661 (UNIVERSITY OF SOUTH FLORIDA) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS5661?

AS5661 is registered to UNIVERSITY OF SOUTH FLORIDA. It announces about 65,536 IPv4 addresses.

How do I detect traffic from AS5661?

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.