Network · AS3428

AS3428 ESnet

AS3428 (ESnet) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS3428

OwnerESnet
KindInternet service provider
Servers, not peopleno
IPv4 addresses68,096
IPv4 ranges12
IPv6 ranges1

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

130.20.128.0/17
130.20.64.0/18
130.20.32.0/19
130.20.16.0/20
130.20.8.0/21
192.101.104.0/22
192.101.100.0/22
130.20.4.0/22
192.101.108.0/23
130.20.2.0/23
192.35.193.0/24
130.20.1.0/24

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

Check an IP address →

Detect it in code

Spot AS3428 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 AS3428

Is AS3428 a datacenter or VPN network?

AS3428 (ESnet) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS3428?

AS3428 is registered to ESnet. It announces about 68,096 IPv4 addresses.

How do I detect traffic from AS3428?

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.