Network · AS3910

AS3910 CenturyLink Communications, LLC

AS3910 (CenturyLink Communications, LLC) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS3910

OwnerCenturyLink Communications, LLC
KindInternet service provider
Servers, not peopleno
IPv4 addresses13,568
IPv4 ranges20
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

204.98.208.0/20
65.120.24.0/21
46.182.56.0/21
185.42.152.0/22
67.148.48.0/23
67.148.66.0/24
67.148.251.0/24
65.158.30.0/24
65.154.234.0/24
65.152.197.0/24
65.148.33.0/24
65.100.13.0/24

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

Check an IP address →

Detect it in code

Spot AS3910 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 AS3910

Is AS3910 a datacenter or VPN network?

AS3910 (CenturyLink Communications, LLC) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS3910?

AS3910 is registered to CenturyLink Communications, LLC. It announces about 13,568 IPv4 addresses.

How do I detect traffic from AS3910?

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.