Network · AS4211

AS4211 Maricopa County Government

AS4211 (Maricopa County Government) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS4211

OwnerMaricopa County Government
KindInternet service provider
Servers, not peopleno
IPv4 addresses14,336
IPv4 ranges3
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

156.42.0.0/19
156.42.192.0/20
156.42.216.0/21

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

Check an IP address →

Detect it in code

Spot AS4211 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 AS4211

Is AS4211 a datacenter or VPN network?

AS4211 (Maricopa County Government) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS4211?

AS4211 is registered to Maricopa County Government. It announces about 14,336 IPv4 addresses.

How do I detect traffic from AS4211?

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.