Network · AS15751

AS15751 Eircom Limited

AS15751 (Eircom Limited) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS15751

  • OwnerEircom Limited
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses24,832
  • IPv4 ranges7
  • IPv6 ranges1
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 109.125.0.0/18
  • 212.129.80.0/20
  • 212.129.72.0/21
  • 212.129.68.0/22
  • 212.129.66.0/23
  • 185.51.72.0/23
  • 212.129.64.0/24

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

Check an IP address →

Detect it in code

Spot AS15751 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 AS15751

Is AS15751 a datacenter or VPN network?

AS15751 (Eircom Limited) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS15751?

AS15751 is registered to Eircom Limited. It announces about 24,832 IPv4 addresses.

How do I detect traffic from AS15751?

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.