Network · AS201577

AS201577 Monsternett AS

AS201577 (Monsternett AS) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS201577

OwnerMonsternett AS
KindInternet service provider
Servers, not peopleno
IPv4 addresses9,216
IPv4 ranges3
IPv6 ranges1

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

217.171.192.0/20
160.5.224.0/20
185.20.168.0/22

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

Check an IP address →

Detect it in code

Spot AS201577 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 AS201577

Is AS201577 a datacenter or VPN network?

AS201577 (Monsternett AS) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS201577?

AS201577 is registered to Monsternett AS. It announces about 9,216 IPv4 addresses.

How do I detect traffic from AS201577?

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.