Network check
ASN
AS50721
- OwnerKoller Sebastian Karl
- KindInternet service provider
- Servers, not peopleno
- IPv4 addresses256
- IPv4 ranges1
- IPv6 ranges0
Risk score0
Nothing suspicious found.
Network · AS50721
AS50721 Koller Sebastian Karl
AS50721 (Koller Sebastian Karl) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.
Detect it in code
Spot AS50721 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 AS50721
Is AS50721 a datacenter or VPN network?
AS50721 (Koller Sebastian Karl) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.
Who owns AS50721?
AS50721 is registered to Koller Sebastian Karl. It announces about 256 IPv4 addresses.
How do I detect traffic from AS50721?
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.