Network · AS12511

AS12511 Die Schweizerische Post AG

AS12511 (Die Schweizerische Post AG) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS12511

OwnerDie Schweizerische Post AG
KindInternet service provider
Servers, not peopleno
IPv4 addresses165,888
IPv4 ranges4
IPv6 ranges2

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

138.191.0.0/16
138.189.0.0/16
194.41.128.0/17
84.246.232.0/21

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

Check an IP address →

Detect it in code

Spot AS12511 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 AS12511

Is AS12511 a datacenter or VPN network?

AS12511 (Die Schweizerische Post AG) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS12511?

AS12511 is registered to Die Schweizerische Post AG. It announces about 165,888 IPv4 addresses.

How do I detect traffic from AS12511?

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.