Network · AS53257

AS53257 The Citadel

AS53257 (The Citadel) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS53257

OwnerThe Citadel
KindInternet service provider
Servers, not peopleno
IPv4 addresses61,440
IPv4 ranges21
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

155.225.128.0/18
155.225.96.0/19
155.225.224.0/19
155.225.80.0/20
155.225.32.0/20
155.225.208.0/20
155.225.16.0/20
155.225.8.0/21
155.225.72.0/21
155.225.200.0/21
155.225.56.0/22
155.225.52.0/22

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

Check an IP address →

Detect it in code

Spot AS53257 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 AS53257

Is AS53257 a datacenter or VPN network?

AS53257 (The Citadel) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS53257?

AS53257 is registered to The Citadel. It announces about 61,440 IPv4 addresses.

How do I detect traffic from AS53257?

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.