Network · AS6406

AS6406 Thomas Jefferson National Accelerator Facility

AS6406 (Thomas Jefferson National Accelerator Facility) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS6406

OwnerThomas Jefferson National Accelerator
KindInternet service provider
Servers, not peopleno
IPv4 addresses65,792
IPv4 ranges2
IPv6 ranges1

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

129.57.0.0/16
192.70.245.0/24

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

Check an IP address →

Detect it in code

Spot AS6406 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 AS6406

Is AS6406 a datacenter or VPN network?

AS6406 (Thomas Jefferson National Accelerator Facility) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS6406?

AS6406 is registered to Thomas Jefferson National Accelerator Facility. It announces about 65,792 IPv4 addresses.

How do I detect traffic from AS6406?

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.