Network · AS27321

AS27321 Internet Systems Consortium, Inc.

AS27321 (Internet Systems Consortium, Inc.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS27321

OwnerInternet Systems Consortium, Inc.
KindInternet service provider
Servers, not peopleno
IPv4 addresses2,048
IPv4 ranges6
IPv6 ranges1

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

192.158.248.0/23
149.20.2.0/23
149.20.66.0/24
149.20.57.0/24
149.20.4.0/24
149.20.0.0/24

Ranges and owner from DB-IP (CC BY 4.0), updated 2026-10-22.

Check an IP address →

Detect it in code

Spot AS27321 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 AS27321

Is AS27321 a datacenter or VPN network?

AS27321 (Internet Systems Consortium, Inc.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS27321?

AS27321 is registered to Internet Systems Consortium, Inc.. It announces about 2,048 IPv4 addresses.

How do I detect traffic from AS27321?

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.