Network · AS1237

AS1237 KISTI

AS1237 (KISTI) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS1237

  • OwnerKISTI
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses291,840
  • IPv4 ranges219
  • IPv6 ranges16
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 150.183.0.0/16
  • 203.250.192.0/18
  • 203.250.0.0/19
  • 134.75.64.0/19
  • 134.75.160.0/19
  • 210.125.32.0/20
  • 210.119.64.0/20
  • 210.119.48.0/20
  • 210.110.144.0/20
  • 210.107.160.0/20
  • 203.254.176.0/20
  • 203.253.96.0/20

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

Check an IP address →

Detect it in code

Spot AS1237 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 AS1237

Is AS1237 a datacenter or VPN network?

AS1237 (KISTI) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS1237?

AS1237 is registered to KISTI. It announces about 291,840 IPv4 addresses.

How do I detect traffic from AS1237?

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.