Network · AS43857

AS43857 Fraport AG Frankfurt Airport Services Worldwide

AS43857 (Fraport AG Frankfurt Airport Services Worldwide) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS43857

  • OwnerFraport AG Frankfurt Airport Services
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses65,536
  • IPv4 ranges1
  • IPv6 ranges1
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 146.234.0.0/16

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

Check an IP address →

Detect it in code

Spot AS43857 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 AS43857

Is AS43857 a datacenter or VPN network?

AS43857 (Fraport AG Frankfurt Airport Services Worldwide) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS43857?

AS43857 is registered to Fraport AG Frankfurt Airport Services Worldwide. It announces about 65,536 IPv4 addresses.

How do I detect traffic from AS43857?

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.