Network · AS27399

AS27399 Balyasny Asset Management L.P.

AS27399 (Balyasny Asset Management L.P.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS27399

OwnerBalyasny Asset Management L.P.
KindInternet service provider
Servers, not peopleno
IPv4 addresses2,816
IPv4 ranges9
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

136.175.142.0/23
103.158.202.0/23
82.98.194.0/24
67.155.2.0/24
38.89.137.0/24
38.131.243.0/24
38.126.139.0/24
38.103.125.0/24
185.179.88.0/24

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

Check an IP address →

Detect it in code

Spot AS27399 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 AS27399

Is AS27399 a datacenter or VPN network?

AS27399 (Balyasny Asset Management L.P.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS27399?

AS27399 is registered to Balyasny Asset Management L.P.. It announces about 2,816 IPv4 addresses.

How do I detect traffic from AS27399?

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.