Network · AS40581

AS40581 Arkansas Research and Education Optical Network

AS40581 (Arkansas Research and Education Optical Network) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS40581

  • OwnerArkansas Research and Education Optica
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses73,472
  • IPv4 ranges11
  • IPv6 ranges16
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 161.31.0.0/16
  • 208.90.104.0/21
  • 147.97.16.0/21
  • 159.150.4.0/22
  • 147.97.12.0/22
  • 147.97.30.0/23
  • 23.144.148.0/24
  • 198.181.240.0/24
  • 198.181.214.0/24
  • 147.97.8.0/24
  • 130.184.47.0/24

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

Check an IP address →

Detect it in code

Spot AS40581 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 AS40581

Is AS40581 a datacenter or VPN network?

AS40581 (Arkansas Research and Education Optical Network) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS40581?

AS40581 is registered to Arkansas Research and Education Optical Network. It announces about 73,472 IPv4 addresses.

How do I detect traffic from AS40581?

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.