Network · AS43278

AS43278 Castles LLC

AS43278 (Castles LLC) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS43278

  • OwnerCastles LLC
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses2,816
  • IPv4 ranges10
  • IPv6 ranges1
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 189.74.110.0/23
  • 95.181.158.0/24
  • 91.220.80.0/24
  • 45.137.154.0/24
  • 45.129.237.0/24
  • 213.226.115.0/24
  • 213.109.97.0/24
  • 212.46.36.0/24
  • 189.74.109.0/24
  • 185.17.0.0/24

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

Check an IP address →

Detect it in code

Spot AS43278 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 AS43278

Is AS43278 a datacenter or VPN network?

AS43278 (Castles LLC) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS43278?

AS43278 is registered to Castles LLC. It announces about 2,816 IPv4 addresses.

How do I detect traffic from AS43278?

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.