Network · AS2511

AS2511 Nippon Telegraph and Telephone Corporation

AS2511 (Nippon Telegraph and Telephone Corporation) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS2511

OwnerNippon Telegraph and Telephone Corpora
KindInternet service provider
Servers, not peopleno
IPv4 addresses41,728
IPv4 ranges5
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

163.138.0.0/17
163.138.128.0/19
192.5.216.0/24
192.47.167.0/24
192.26.94.0/24

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

Check an IP address →

Detect it in code

Spot AS2511 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 AS2511

Is AS2511 a datacenter or VPN network?

AS2511 (Nippon Telegraph and Telephone Corporation) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS2511?

AS2511 is registered to Nippon Telegraph and Telephone Corporation. It announces about 41,728 IPv4 addresses.

How do I detect traffic from AS2511?

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.