Network · AS15517

AS15517 Netstream Holding AG

AS15517 (Netstream Holding AG) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS15517

OwnerNetstream Holding AG
KindInternet service provider
Servers, not peopleno
IPv4 addresses21,504
IPv4 ranges12
IPv6 ranges1

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

94.78.32.0/19
94.78.16.0/20
94.78.8.0/21
62.65.128.0/21
213.133.240.0/21
94.78.4.0/22
94.78.0.0/23
62.65.138.0/23
62.65.159.0/24
62.65.152.0/24
62.65.140.0/24
62.65.136.0/24

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

Check an IP address →

Detect it in code

Spot AS15517 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 AS15517

Is AS15517 a datacenter or VPN network?

AS15517 (Netstream Holding AG) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS15517?

AS15517 is registered to Netstream Holding AG. It announces about 21,504 IPv4 addresses.

How do I detect traffic from AS15517?

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.