Network · AS4581

AS4581 Socket Holdings Corporation

AS4581 (Socket Holdings Corporation) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS4581

OwnerSocket Holdings Corporation
KindInternet service provider
Servers, not peopleno
IPv4 addresses100,864
IPv4 ranges32
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

38.255.128.0/18
38.212.0.0/18
154.36.192.0/18
216.106.64.0/19
216.106.0.0/19
64.85.192.0/20
216.106.32.0/20
174.34.32.0/20
174.34.0.0/20
64.85.216.0/21
38.45.192.0/21
216.106.48.0/21

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

Check an IP address →

Detect it in code

Spot AS4581 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 AS4581

Is AS4581 a datacenter or VPN network?

AS4581 (Socket Holdings Corporation) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS4581?

AS4581 is registered to Socket Holdings Corporation. It announces about 100,864 IPv4 addresses.

How do I detect traffic from AS4581?

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.