Network · AS57943

AS57943 Holon SAS

AS57943 (Holon SAS) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS57943

OwnerHolon SAS
KindInternet service provider
Servers, not peopleno
IPv4 addresses5,120
IPv4 ranges3
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

37.157.128.0/21
178.250.104.0/21
185.225.184.0/22

Ranges and owner from DB-IP (CC BY 4.0), updated 2026-10-22.

Check an IP address →

Detect it in code

Spot AS57943 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 AS57943

Is AS57943 a datacenter or VPN network?

AS57943 (Holon SAS) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS57943?

AS57943 is registered to Holon SAS. It announces about 5,120 IPv4 addresses.

How do I detect traffic from AS57943?

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.