Network · AS21554

AS21554 Wisconsin CyberLynk Network, Inc.

AS21554 (Wisconsin CyberLynk Network, Inc.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS21554

OwnerWisconsin CyberLynk Network, Inc.
KindInternet service provider
Servers, not peopleno
IPv4 addresses32,000
IPv4 ranges14
IPv6 ranges2

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

38.23.32.0/19
66.185.16.0/20
38.39.176.0/20
209.236.224.0/20
199.38.80.0/21
162.221.88.0/21
199.195.144.0/22
199.102.236.0/22
198.206.132.0/22
192.159.64.0/22
162.255.16.0/22
162.252.208.0/22

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

Check an IP address →

Detect it in code

Spot AS21554 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 AS21554

Is AS21554 a datacenter or VPN network?

AS21554 (Wisconsin CyberLynk Network, Inc.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS21554?

AS21554 is registered to Wisconsin CyberLynk Network, Inc.. It announces about 32,000 IPv4 addresses.

How do I detect traffic from AS21554?

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.