Network · AS18103

AS18103 Neuviz Net

AS18103 (Neuviz Net) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS18103

  • OwnerNeuviz Net
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses15,104
  • IPv4 ranges14
  • IPv6 ranges1
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 203.128.64.0/20
  • 203.128.80.0/21
  • 103.30.88.0/21
  • 43.248.24.0/22
  • 203.128.92.0/22
  • 103.30.84.0/22
  • 103.10.96.0/22
  • 203.201.50.0/23
  • 203.128.88.0/23
  • 103.26.208.0/23
  • 103.23.242.0/23
  • 203.128.91.0/24

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

Check an IP address →

Detect it in code

Spot AS18103 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 AS18103

Is AS18103 a datacenter or VPN network?

AS18103 (Neuviz Net) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS18103?

AS18103 is registered to Neuviz Net. It announces about 15,104 IPv4 addresses.

How do I detect traffic from AS18103?

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.