Network · AS21803

AS21803 Cedar Networks

AS21803 (Cedar Networks) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS21803

OwnerCedar Networks
KindInternet service provider
Servers, not peopleno
IPv4 addresses13,312
IPv4 ranges22
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

69.39.24.0/21
69.39.0.0/21
67.223.168.0/22
67.223.160.0/22
209.140.12.0/22
69.39.8.0/23
69.39.22.0/23
69.39.14.0/23
67.223.174.0/23
67.223.164.0/23
209.140.8.0/23
209.140.4.0/23

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

Check an IP address →

Detect it in code

Spot AS21803 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 AS21803

Is AS21803 a datacenter or VPN network?

AS21803 (Cedar Networks) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS21803?

AS21803 is registered to Cedar Networks. It announces about 13,312 IPv4 addresses.

How do I detect traffic from AS21803?

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.