Network · AS21191

AS21191 Joint Stock Company TransTeleCom

AS21191 (Joint Stock Company TransTeleCom) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS21191

OwnerJoint Stock Company TransTeleCom
KindInternet service provider
Servers, not peopleno
IPv4 addresses25,600
IPv4 ranges7
IPv6 ranges1

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

83.69.0.0/19
80.92.0.0/19
5.43.240.0/21
5.178.24.0/21
37.99.216.0/21
149.154.112.0/21
185.2.184.0/22

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

Check an IP address →

Detect it in code

Spot AS21191 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 AS21191

Is AS21191 a datacenter or VPN network?

AS21191 (Joint Stock Company TransTeleCom) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS21191?

AS21191 is registered to Joint Stock Company TransTeleCom. It announces about 25,600 IPv4 addresses.

How do I detect traffic from AS21191?

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.