Network · AS20404

AS20404 NRG Energy, Inc.

AS20404 (NRG Energy, Inc.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS20404

OwnerNRG Energy, Inc.
KindInternet service provider
Servers, not peopleno
IPv4 addresses2,304
IPv4 ranges6
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

158.81.208.0/22
158.81.252.0/24
158.81.251.0/24
158.81.168.0/24
158.81.160.0/24
158.81.153.0/24

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

Check an IP address →

Detect it in code

Spot AS20404 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 AS20404

Is AS20404 a datacenter or VPN network?

AS20404 (NRG Energy, Inc.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS20404?

AS20404 is registered to NRG Energy, Inc.. It announces about 2,304 IPv4 addresses.

How do I detect traffic from AS20404?

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.