Network · AS209

AS209 CenturyLink Communications, LLC

AS209 (CenturyLink Communications, LLC) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS209

OwnerCenturyLink Communications, LLC
KindInternet service provider
Servers, not peopleno
IPv4 addresses15,665,064
IPv4 ranges4,397
IPv6 ranges67

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

97.120.0.0/14
97.116.0.0/14
67.0.0.0/14
65.136.0.0/14
63.152.0.0/14
174.20.0.0/14
97.124.0.0/15
75.168.0.0/15
75.166.0.0/15
71.38.0.0/15
71.214.0.0/15
71.208.0.0/15

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

Check an IP address →

Detect it in code

Spot AS209 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 AS209

Is AS209 a datacenter or VPN network?

AS209 (CenturyLink Communications, LLC) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS209?

AS209 is registered to CenturyLink Communications, LLC. It announces about 15,665,064 IPv4 addresses.

How do I detect traffic from AS209?

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.