Network · AS21453

AS21453 Flex Ltd.

AS21453 (Flex Ltd.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS21453

  • OwnerFlex Ltd.
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses117,248
  • IPv4 ranges19
  • IPv6 ranges1
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 178.167.0.0/17
  • 95.183.64.0/18
  • 94.253.0.0/18
  • 94.253.96.0/19
  • 80.252.128.0/19
  • 212.7.224.0/19
  • 178.57.224.0/19
  • 94.253.64.0/20
  • 80.84.112.0/20
  • 88.84.216.0/21
  • 88.84.200.0/21
  • 31.31.64.0/21

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

Check an IP address →

Detect it in code

Spot AS21453 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 AS21453

Is AS21453 a datacenter or VPN network?

AS21453 (Flex Ltd.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS21453?

AS21453 is registered to Flex Ltd.. It announces about 117,248 IPv4 addresses.

How do I detect traffic from AS21453?

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.