Network · AS26667

AS26667 The Rubicon Project, Inc.

AS26667 (The Rubicon Project, Inc.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS26667

OwnerThe Rubicon Project, Inc.
KindInternet service provider
Servers, not peopleno
IPv4 addresses23,296
IPv4 ranges7
IPv6 ranges3

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

216.19.192.0/19
191.215.64.0/19
216.109.160.0/20
69.173.152.0/22
69.173.144.0/22
69.173.156.0/23
69.173.158.0/24

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

Check an IP address →

Detect it in code

Spot AS26667 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 AS26667

Is AS26667 a datacenter or VPN network?

AS26667 (The Rubicon Project, Inc.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS26667?

AS26667 is registered to The Rubicon Project, Inc.. It announces about 23,296 IPv4 addresses.

How do I detect traffic from AS26667?

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.