Network · AS208172

AS208172 Proton AG

AS208172 (Proton AG) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS208172

  • OwnerProton AG
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses23,552
  • IPv4 ranges22
  • IPv6 ranges0
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 159.26.96.0/19
  • 80.47.32.0/21
  • 72.251.208.0/21
  • 80.47.48.0/22
  • 80.47.44.0/22
  • 72.251.216.0/22
  • 205.147.28.0/22
  • 205.147.16.0/22
  • 153.75.48.0/22
  • 134.82.68.0/22
  • 72.251.220.0/23
  • 153.75.52.0/23

Ranges and owner from DB-IP (CC BY 4.0), updated 2026-10-22.

Check an IP address →

Detect it in code

Spot AS208172 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 AS208172

Is AS208172 a datacenter or VPN network?

AS208172 (Proton AG) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS208172?

AS208172 is registered to Proton AG. It announces about 23,552 IPv4 addresses.

How do I detect traffic from AS208172?

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.