Network · AS3745

AS3745 NTT DATA Services Holdings Corporation

AS3745 (NTT DATA Services Holdings Corporation) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS3745

OwnerNTT DATA Services Holdings Corporation
KindInternet service provider
Servers, not peopleno
IPv4 addresses17,408
IPv4 ranges3
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

148.9.64.0/18
148.9.244.0/23
148.9.242.0/23

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

Check an IP address →

Detect it in code

Spot AS3745 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 AS3745

Is AS3745 a datacenter or VPN network?

AS3745 (NTT DATA Services Holdings Corporation) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS3745?

AS3745 is registered to NTT DATA Services Holdings Corporation. It announces about 17,408 IPv4 addresses.

How do I detect traffic from AS3745?

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.