Network · AS31835

AS31835 Contour Networks

AS31835 (Contour Networks) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS31835

OwnerContour Networks
KindInternet service provider
Servers, not peopleno
IPv4 addresses3,328
IPv4 ranges3
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

74.115.152.0/21
209.49.92.0/22
66.239.111.0/24

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

Check an IP address →

Detect it in code

Spot AS31835 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 AS31835

Is AS31835 a datacenter or VPN network?

AS31835 (Contour Networks) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS31835?

AS31835 is registered to Contour Networks. It announces about 3,328 IPv4 addresses.

How do I detect traffic from AS31835?

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.