Network · AS13371

AS13371 Duke University

AS13371 (Duke University) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS13371

OwnerDuke University
KindInternet service provider
Servers, not peopleno
IPv4 addresses151,808
IPv4 ranges5
IPv6 ranges1

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

152.3.0.0/16
152.16.0.0/16
67.159.64.0/18
152.22.224.0/20
198.86.29.0/24

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

Check an IP address →

Detect it in code

Spot AS13371 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 AS13371

Is AS13371 a datacenter or VPN network?

AS13371 (Duke University) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS13371?

AS13371 is registered to Duke University. It announces about 151,808 IPv4 addresses.

How do I detect traffic from AS13371?

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.