Network · AS3351

AS3351 Ioffe Physical-Technical Institute of the Russian Academy of Sciences

AS3351 (Ioffe Physical-Technical Institute of the Russian Academy of Sciences) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS3351

  • OwnerIoffe Physical-Technical Institute of
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses2,816
  • IPv4 ranges3
  • IPv6 ranges0
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 194.85.224.0/21
  • 194.85.236.0/23
  • 194.85.238.0/24

Ranges and owner from DB-IP (CC BY 4.0), updated 2026-10-22.

Check an IP address →

Detect it in code

Spot AS3351 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 AS3351

Is AS3351 a datacenter or VPN network?

AS3351 (Ioffe Physical-Technical Institute of the Russian Academy of Sciences) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS3351?

AS3351 is registered to Ioffe Physical-Technical Institute of the Russian Academy of Sciences. It announces about 2,816 IPv4 addresses.

How do I detect traffic from AS3351?

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.