Network · AS138449

AS138449 SIANG YU SCIENCE AND TECHNOLOGY LIMITED

AS138449 (SIANG YU SCIENCE AND TECHNOLOGY LIMITED) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS138449

OwnerSIANG YU SCIENCE AND TECHNOLOGY LIMITE
KindInternet service provider
Servers, not peopleno
IPv4 addresses768
IPv4 ranges3
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

42.0.200.0/24
139.183.100.0/24
122.113.50.0/24

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

Check an IP address →

Detect it in code

Spot AS138449 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 AS138449

Is AS138449 a datacenter or VPN network?

AS138449 (SIANG YU SCIENCE AND TECHNOLOGY LIMITED) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS138449?

AS138449 is registered to SIANG YU SCIENCE AND TECHNOLOGY LIMITED. It announces about 768 IPv4 addresses.

How do I detect traffic from AS138449?

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.