Network check
ASN
AS43909
- OwnerCrystall Ltd.
- KindInternet service provider
- Servers, not peopleno
- IPv4 addresses4,096
- IPv4 ranges1
- IPv6 ranges0
Risk score0
Nothing suspicious found.
Network · AS43909
AS43909 Crystall Ltd.
AS43909 (Crystall Ltd.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.
Detect it in code
Spot AS43909 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 AS43909
Is AS43909 a datacenter or VPN network?
AS43909 (Crystall Ltd.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.
Who owns AS43909?
AS43909 is registered to Crystall Ltd.. It announces about 4,096 IPv4 addresses.
How do I detect traffic from AS43909?
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.