Network · AS203258

AS203258 UCNS Limited

AS203258 (UCNS Limited) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS203258

OwnerUCNS Limited
KindInternet service provider
Servers, not peopleno
IPv4 addresses1,280
IPv4 ranges3
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

178.21.38.0/23
178.21.32.0/23
178.21.34.0/24

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

Check an IP address →

Detect it in code

Spot AS203258 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 AS203258

Is AS203258 a datacenter or VPN network?

AS203258 (UCNS Limited) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS203258?

AS203258 is registered to UCNS Limited. It announces about 1,280 IPv4 addresses.

How do I detect traffic from AS203258?

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.