Network · AS21504

AS21504 The Bessemer Group, Inc.

AS21504 (The Bessemer Group, Inc.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS21504

OwnerThe Bessemer Group, Inc.
KindInternet service provider
Servers, not peopleno
IPv4 addresses4,864
IPv4 ranges8
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

198.160.48.0/21
198.160.44.0/23
198.160.42.0/23
198.160.38.0/23
198.160.34.0/23
198.160.57.0/24
198.160.40.0/24
198.160.37.0/24

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

Check an IP address →

Detect it in code

Spot AS21504 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 AS21504

Is AS21504 a datacenter or VPN network?

AS21504 (The Bessemer Group, Inc.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS21504?

AS21504 is registered to The Bessemer Group, Inc.. It announces about 4,864 IPv4 addresses.

How do I detect traffic from AS21504?

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.