Network · AS21541

AS21541 101Netlink

AS21541 (101Netlink) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS21541

Owner101Netlink
KindInternet service provider
Servers, not peopleno
IPv4 addresses8,704
IPv4 ranges4
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

208.186.48.0/20
64.194.64.0/21
64.194.160.0/21
64.195.220.0/23

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

Check an IP address →

Detect it in code

Spot AS21541 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 AS21541

Is AS21541 a datacenter or VPN network?

AS21541 (101Netlink) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS21541?

AS21541 is registered to 101Netlink. It announces about 8,704 IPv4 addresses.

How do I detect traffic from AS21541?

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.