Network · AS18596

AS18596 Madison Telephone Company

AS18596 (Madison Telephone Company) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS18596

OwnerMadison Telephone Company
KindInternet service provider
Servers, not peopleno
IPv4 addresses12,288
IPv4 ranges2
IPv6 ranges1

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

66.242.192.0/19
76.77.224.0/20

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

Check an IP address →

Detect it in code

Spot AS18596 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 AS18596

Is AS18596 a datacenter or VPN network?

AS18596 (Madison Telephone Company) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS18596?

AS18596 is registered to Madison Telephone Company. It announces about 12,288 IPv4 addresses.

How do I detect traffic from AS18596?

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.