Network · AS17439

AS17439 NTTCINS

AS17439 (NTTCINS) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS17439

OwnerNTTCINS
KindInternet service provider
Servers, not peopleno
IPv4 addresses135,680
IPv4 ranges49
IPv6 ranges6

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

180.179.0.0/16
124.153.64.0/18
202.87.32.0/19
142.79.224.0/19
123.108.32.0/19
159.117.144.0/20
203.112.144.0/21
45.251.76.0/22
43.225.0.0/22
203.95.216.0/22
168.220.252.0/22
168.220.224.0/22

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

Check an IP address →

Detect it in code

Spot AS17439 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 AS17439

Is AS17439 a datacenter or VPN network?

AS17439 (NTTCINS) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS17439?

AS17439 is registered to NTTCINS. It announces about 135,680 IPv4 addresses.

How do I detect traffic from AS17439?

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.