Network · AS16

AS16 Lawrence Berkeley National Laboratory

AS16 (Lawrence Berkeley National Laboratory) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS16

OwnerLawrence Berkeley National Laboratory
KindInternet service provider
Servers, not peopleno
IPv4 addresses131,072
IPv4 ranges2
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

131.243.0.0/16
128.3.0.0/16

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

Check an IP address →

Detect it in code

Spot AS16 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 AS16

Is AS16 a datacenter or VPN network?

AS16 (Lawrence Berkeley National Laboratory) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS16?

AS16 is registered to Lawrence Berkeley National Laboratory. It announces about 131,072 IPv4 addresses.

How do I detect traffic from AS16?

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.