Network check
ASN
AS21525
- OwnerSeattle Public Library
- KindInternet service provider
- Servers, not peopleno
- IPv4 addresses4,096
- IPv4 ranges1
- IPv6 ranges1
Risk score0
Nothing suspicious found.
Network · AS21525
AS21525 Seattle Public Library
AS21525 (Seattle Public Library) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.
Detect it in code
Spot AS21525 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 AS21525
Is AS21525 a datacenter or VPN network?
AS21525 (Seattle Public Library) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.
Who owns AS21525?
AS21525 is registered to Seattle Public Library. It announces about 4,096 IPv4 addresses.
How do I detect traffic from AS21525?
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.