Network · AS24357

AS24357 CERNET2 IX at South China University of Technology

AS24357 (CERNET2 IX at South China University of Technology) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS24357

  • OwnerCERNET2 IX at South China University o
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses148,480
  • IPv4 ranges99
  • IPv6 ranges3
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 222.202.0.0/18
  • 211.66.32.0/19
  • 202.116.160.0/19
  • 222.203.112.0/20
  • 222.202.240.0/20
  • 222.200.16.0/20
  • 219.223.144.0/20
  • 211.66.224.0/20
  • 202.116.240.0/20
  • 125.218.240.0/20
  • 125.217.176.0/20
  • 125.217.16.0/20

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

Check an IP address →

Detect it in code

Spot AS24357 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 AS24357

Is AS24357 a datacenter or VPN network?

AS24357 (CERNET2 IX at South China University of Technology) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS24357?

AS24357 is registered to CERNET2 IX at South China University of Technology. It announces about 148,480 IPv4 addresses.

How do I detect traffic from AS24357?

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.