Network · AS36671

AS36671 TWO SIGMA INVESTMENTS, LP

AS36671 (TWO SIGMA INVESTMENTS, LP) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS36671

  • OwnerTWO SIGMA INVESTMENTS, LP
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses3,584
  • IPv4 ranges10
  • IPv6 ranges1
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 208.77.212.0/22
  • 46.183.200.0/23
  • 8.245.33.0/24
  • 8.2.105.0/24
  • 38.97.45.0/24
  • 38.27.161.0/24
  • 38.117.134.0/24
  • 38.108.14.0/24
  • 212.133.79.0/24
  • 207.226.133.0/24

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

Check an IP address →

Detect it in code

Spot AS36671 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 AS36671

Is AS36671 a datacenter or VPN network?

AS36671 (TWO SIGMA INVESTMENTS, LP) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS36671?

AS36671 is registered to TWO SIGMA INVESTMENTS, LP. It announces about 3,584 IPv4 addresses.

How do I detect traffic from AS36671?

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.