Network · AS33377

AS33377 Federal Home Loan Bank of Chicago

AS33377 (Federal Home Loan Bank of Chicago) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS33377

  • OwnerFederal Home Loan Bank of Chicago
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses512
  • IPv4 ranges2
  • IPv6 ranges0
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 204.16.87.0/24
  • 204.16.84.0/24

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

Check an IP address →

Detect it in code

Spot AS33377 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 AS33377

Is AS33377 a datacenter or VPN network?

AS33377 (Federal Home Loan Bank of Chicago) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS33377?

AS33377 is registered to Federal Home Loan Bank of Chicago. It announces about 512 IPv4 addresses.

How do I detect traffic from AS33377?

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.