Network · AS21660

AS21660 Baxalta Incorporated

AS21660 (Baxalta Incorporated) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS21660

OwnerBaxalta Incorporated
KindInternet service provider
Servers, not peopleno
IPv4 addresses4,352
IPv4 ranges7
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

63.84.72.0/22
63.244.0.0/22
185.89.148.0/22
43.229.156.0/23
43.229.158.0/24
104.254.253.0/24
103.48.172.0/24

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

Check an IP address →

Detect it in code

Spot AS21660 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 AS21660

Is AS21660 a datacenter or VPN network?

AS21660 (Baxalta Incorporated) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS21660?

AS21660 is registered to Baxalta Incorporated. It announces about 4,352 IPv4 addresses.

How do I detect traffic from AS21660?

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.