Network · AS40371

AS40371 PROS, Inc.

AS40371 (PROS, Inc.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS40371

  • OwnerPROS, Inc.
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses2,048
  • IPv4 ranges8
  • IPv6 ranges0
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 84.207.212.0/24
  • 83.125.36.0/24
  • 8.20.60.0/24
  • 8.20.59.0/24
  • 8.20.55.0/24
  • 38.65.220.0/24
  • 198.99.255.0/24
  • 192.31.163.0/24

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

Check an IP address →

Detect it in code

Spot AS40371 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 AS40371

Is AS40371 a datacenter or VPN network?

AS40371 (PROS, Inc.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS40371?

AS40371 is registered to PROS, Inc.. It announces about 2,048 IPv4 addresses.

How do I detect traffic from AS40371?

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.