Network · AS51397

AS51397 OJSC "Petrol Stock Company Bashneft"

AS51397 (OJSC "Petrol Stock Company Bashneft") looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS51397

OwnerOJSC "Petrol Stock Company Bashneft"
KindInternet service provider
Servers, not peopleno
IPv4 addresses512
IPv4 ranges1
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

91.230.100.0/23

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

Check an IP address →

Detect it in code

Spot AS51397 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 AS51397

Is AS51397 a datacenter or VPN network?

AS51397 (OJSC "Petrol Stock Company Bashneft") looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS51397?

AS51397 is registered to OJSC "Petrol Stock Company Bashneft". It announces about 512 IPv4 addresses.

How do I detect traffic from AS51397?

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.