Network · AS38819

AS38819 CSL Limited

AS38819 (CSL Limited) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS38819

OwnerCSL Limited
KindInternet service provider
Servers, not peopleno
IPv4 addresses45,056
IPv4 ranges3
IPv6 ranges2

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

14.0.128.0/17
110.4.0.0/19
203.210.0.0/20

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

Check an IP address →

Detect it in code

Spot AS38819 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 AS38819

Is AS38819 a datacenter or VPN network?

AS38819 (CSL Limited) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS38819?

AS38819 is registered to CSL Limited. It announces about 45,056 IPv4 addresses.

How do I detect traffic from AS38819?

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.