Network check
ASN
AS51257
- OwnerCERIZ SASU
- KindInternet service provider
- Servers, not peopleno
- IPv4 addresses256
- IPv4 ranges1
- IPv6 ranges1
Risk score0
Nothing suspicious found.
Network · AS51257
AS51257 CERIZ SASU
AS51257 (CERIZ SASU) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.
Detect it in code
Spot AS51257 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 AS51257
Is AS51257 a datacenter or VPN network?
AS51257 (CERIZ SASU) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.
Who owns AS51257?
AS51257 is registered to CERIZ SASU. It announces about 256 IPv4 addresses.
How do I detect traffic from AS51257?
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.