Network · AS37963

AS37963 Hangzhou Alibaba Advertising Co.,Ltd.

AS37963 (Hangzhou Alibaba Advertising Co.,Ltd.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS37963

  • OwnerHangzhou Alibaba Advertising Co.,Ltd.
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses9,426,688
  • IPv4 ranges108
  • IPv6 ranges32
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 47.96.0.0/12
  • 8.152.0.0/13
  • 8.136.0.0/13
  • 47.112.0.0/13
  • 8.164.0.0/14
  • 8.144.0.0/14
  • 8.132.0.0/14
  • 47.92.0.0/14
  • 47.120.0.0/14
  • 39.104.0.0/14
  • 39.100.0.0/14
  • 223.4.0.0/14

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

Check an IP address →

Detect it in code

Spot AS37963 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 AS37963

Is AS37963 a datacenter or VPN network?

AS37963 (Hangzhou Alibaba Advertising Co.,Ltd.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS37963?

AS37963 is registered to Hangzhou Alibaba Advertising Co.,Ltd.. It announces about 9,426,688 IPv4 addresses.

How do I detect traffic from AS37963?

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.