Network · AS3477

AS3477 National Oceanic and Atmospheric Administration

AS3477 (National Oceanic and Atmospheric Administration) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS3477

OwnerNational Oceanic and Atmospheric Admin
KindInternet service provider
Servers, not peopleno
IPv4 addresses322,048
IPv4 ranges51
IPv6 ranges14

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

161.55.0.0/16
155.206.0.0/16
140.90.0.0/16
140.172.0.0/16
205.156.0.0/19
198.206.32.0/19
137.75.64.0/19
205.156.32.0/20
204.228.176.0/20
140.208.192.0/20
137.75.96.0/20
205.156.48.0/21

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

Check an IP address →

Detect it in code

Spot AS3477 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 AS3477

Is AS3477 a datacenter or VPN network?

AS3477 (National Oceanic and Atmospheric Administration) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS3477?

AS3477 is registered to National Oceanic and Atmospheric Administration. It announces about 322,048 IPv4 addresses.

How do I detect traffic from AS3477?

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.