Network · AS49

AS49 National Institute of Standards and Technology

AS49 (National Institute of Standards and Technology) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS49

OwnerNational Institute of Standards and Te
KindInternet service provider
Servers, not peopleno
IPv4 addresses65,536
IPv4 ranges12
IPv6 ranges3

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

129.6.128.0/17
129.6.64.0/18
129.6.0.0/19
129.6.56.0/21
129.6.40.0/21
129.6.52.0/22
129.6.32.0/22
132.163.96.0/23
129.6.48.0/23
129.6.38.0/23
129.6.50.0/24
129.6.36.0/24

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

Check an IP address →

Detect it in code

Spot AS49 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 AS49

Is AS49 a datacenter or VPN network?

AS49 (National Institute of Standards and Technology) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS49?

AS49 is registered to National Institute of Standards and Technology. It announces about 65,536 IPv4 addresses.

How do I detect traffic from AS49?

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.