Network · AS38255

AS38255 China Education and Research Network (CERNET)

AS38255 (China Education and Research Network (CERNET)) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS38255

OwnerChina Education and Research Network (
KindInternet service provider
Servers, not peopleno
IPv4 addresses2,048
IPv4 ranges1
IPv6 ranges3

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

118.229.40.0/21

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

Check an IP address →

Detect it in code

Spot AS38255 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 AS38255

Is AS38255 a datacenter or VPN network?

AS38255 (China Education and Research Network (CERNET)) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS38255?

AS38255 is registered to China Education and Research Network (CERNET). It announces about 2,048 IPv4 addresses.

How do I detect traffic from AS38255?

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.