Network · AS137735

AS137735 China Construction Bank

AS137735 (China Construction Bank) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS137735

OwnerChina Construction Bank
KindInternet service provider
Servers, not peopleno
IPv4 addresses9,984
IPv4 ranges10
IPv6 ranges3

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

42.240.0.0/21
42.201.64.0/21
42.240.8.0/22
42.240.20.0/22
42.201.72.0/22
103.126.124.0/22
42.240.16.0/23
42.240.12.0/23
42.201.76.0/23
42.240.48.0/24

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

Check an IP address →

Detect it in code

Spot AS137735 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 AS137735

Is AS137735 a datacenter or VPN network?

AS137735 (China Construction Bank) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS137735?

AS137735 is registered to China Construction Bank. It announces about 9,984 IPv4 addresses.

How do I detect traffic from AS137735?

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.