Network · AS3949

AS3949 NTT America, Inc.

AS3949 (NTT America, Inc.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS3949

OwnerNTT America, Inc.
KindInternet service provider
Servers, not peopleno
IPv4 addresses14,848
IPv4 ranges25
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

80.174.216.0/21
217.24.64.0/21
205.132.16.0/21
91.123.72.0/22
91.123.68.0/22
207.71.84.0/22
80.96.148.0/23
23.27.212.0/23
166.88.42.0/23
62.73.186.0/24
45.149.226.0/24
45.149.225.0/24

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

Check an IP address →

Detect it in code

Spot AS3949 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 AS3949

Is AS3949 a datacenter or VPN network?

AS3949 (NTT America, Inc.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS3949?

AS3949 is registered to NTT America, Inc.. It announces about 14,848 IPv4 addresses.

How do I detect traffic from AS3949?

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.