Network · AS13821

AS13821 AllianceBernstein L.P.

AS13821 (AllianceBernstein L.P.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS13821

  • OwnerAllianceBernstein L.P.
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses4,608
  • IPv4 ranges13
  • IPv6 ranges0
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 206.218.248.0/23
  • 206.218.246.0/23
  • 206.218.234.0/23
  • 206.218.214.0/23
  • 206.218.206.0/23
  • 206.218.240.0/24
  • 206.218.232.0/24
  • 206.218.229.0/24
  • 206.218.223.0/24
  • 206.218.213.0/24
  • 206.218.209.0/24
  • 165.101.85.0/24

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

Check an IP address →

Detect it in code

Spot AS13821 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 AS13821

Is AS13821 a datacenter or VPN network?

AS13821 (AllianceBernstein L.P.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS13821?

AS13821 is registered to AllianceBernstein L.P.. It announces about 4,608 IPv4 addresses.

How do I detect traffic from AS13821?

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.