Network · AS16376

AS16376 SysGroup plc

AS16376 (SysGroup plc) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS16376

OwnerSysGroup plc
KindInternet service provider
Servers, not peopleno
IPv4 addresses4,096
IPv4 ranges2
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

94.199.184.0/21
37.35.88.0/21

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

Check an IP address →

Detect it in code

Spot AS16376 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 AS16376

Is AS16376 a datacenter or VPN network?

AS16376 (SysGroup plc) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS16376?

AS16376 is registered to SysGroup plc. It announces about 4,096 IPv4 addresses.

How do I detect traffic from AS16376?

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.