Network · AS3756

AS3756 NYSERNet

AS3756 (NYSERNet) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS3756

OwnerNYSERNet
KindInternet service provider
Servers, not peopleno
IPv4 addresses6,144
IPv4 ranges3
IPv6 ranges1

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

199.109.224.0/20
199.109.32.0/22
199.109.16.0/22

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

Check an IP address →

Detect it in code

Spot AS3756 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 AS3756

Is AS3756 a datacenter or VPN network?

AS3756 (NYSERNet) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS3756?

AS3756 is registered to NYSERNet. It announces about 6,144 IPv4 addresses.

How do I detect traffic from AS3756?

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.