Network · AS401734

AS401734 LANtastic Internet

AS401734 (LANtastic Internet) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS401734

OwnerLANtastic Internet
KindInternet service provider
Servers, not peopleno
IPv4 addresses4,352
IPv4 ranges2
IPv6 ranges1

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

209.92.240.0/20
23.139.44.0/24

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

Check an IP address →

Detect it in code

Spot AS401734 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 AS401734

Is AS401734 a datacenter or VPN network?

AS401734 (LANtastic Internet) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS401734?

AS401734 is registered to LANtastic Internet. It announces about 4,352 IPv4 addresses.

How do I detect traffic from AS401734?

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.