Network · AS21835

AS21835 Scarsdale Security Systems, Inc.

AS21835 (Scarsdale Security Systems, Inc.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS21835

OwnerScarsdale Security Systems, Inc.
KindInternet service provider
Servers, not peopleno
IPv4 addresses1,024
IPv4 ranges1
IPv6 ranges1

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

199.16.212.0/22

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

Check an IP address →

Detect it in code

Spot AS21835 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 AS21835

Is AS21835 a datacenter or VPN network?

AS21835 (Scarsdale Security Systems, Inc.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS21835?

AS21835 is registered to Scarsdale Security Systems, Inc.. It announces about 1,024 IPv4 addresses.

How do I detect traffic from AS21835?

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.