Network · AS63737

AS63737 VIETSERVER SERVICES TECHNOLOGY COMPANY LIMITED

AS63737 (VIETSERVER SERVICES TECHNOLOGY COMPANY LIMITED) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS63737

OwnerVIETSERVER SERVICES TECHNOLOGY COMPANY
KindInternet service provider
Servers, not peopleno
IPv4 addresses23,552
IPv4 ranges40
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

202.55.132.0/22
157.66.156.0/22
157.10.48.0/22
103.74.104.0/22
103.57.128.0/22
103.232.52.0/22
42.96.10.0/23
36.50.52.0/23
160.30.204.0/23
160.25.76.0/23
160.25.234.0/23
160.25.168.0/23

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

Check an IP address →

Detect it in code

Spot AS63737 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 AS63737

Is AS63737 a datacenter or VPN network?

AS63737 (VIETSERVER SERVICES TECHNOLOGY COMPANY LIMITED) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS63737?

AS63737 is registered to VIETSERVER SERVICES TECHNOLOGY COMPANY LIMITED. It announces about 23,552 IPv4 addresses.

How do I detect traffic from AS63737?

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.