Network · AS3598

AS3598 Microsoft Corporation

AS3598 (Microsoft Corporation) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS3598

  • OwnerMicrosoft Corporation
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses531,200
  • IPv4 ranges27
  • IPv6 ranges64
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 65.53.0.0/16
  • 157.60.0.0/16
  • 157.59.0.0/16
  • 157.57.0.0/16
  • 157.54.0.0/16
  • 131.107.0.0/16
  • 167.220.0.0/17
  • 157.58.0.0/17
  • 167.220.128.0/18
  • 157.58.128.0/18
  • 167.220.192.0/19
  • 157.58.224.0/19

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

Check an IP address →

Detect it in code

Spot AS3598 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 AS3598

Is AS3598 a datacenter or VPN network?

AS3598 (Microsoft Corporation) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS3598?

AS3598 is registered to Microsoft Corporation. It announces about 531,200 IPv4 addresses.

How do I detect traffic from AS3598?

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.