Network · AS21896

AS21896 Alliant Energy

AS21896 (Alliant Energy) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS21896

OwnerAlliant Energy
KindInternet service provider
Servers, not peopleno
IPv4 addresses4,096
IPv4 ranges7
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

198.7.44.0/22
207.71.142.0/23
207.71.136.0/23
207.71.134.0/23
207.71.128.0/23
198.7.42.0/23
198.7.38.0/23

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

Check an IP address →

Detect it in code

Spot AS21896 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 AS21896

Is AS21896 a datacenter or VPN network?

AS21896 (Alliant Energy) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS21896?

AS21896 is registered to Alliant Energy. It announces about 4,096 IPv4 addresses.

How do I detect traffic from AS21896?

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.