Network · AS21603

AS21603 Universidad La Salle, AC

AS21603 (Universidad La Salle, AC) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS21603

OwnerUniversidad La Salle, AC
KindInternet service provider
Servers, not peopleno
IPv4 addresses4,608
IPv4 ranges7
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

200.13.88.0/21
200.33.100.0/22
200.33.104.0/23
200.33.98.0/24
200.33.97.0/24
200.10.243.0/24
192.100.202.0/24

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

Check an IP address →

Detect it in code

Spot AS21603 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 AS21603

Is AS21603 a datacenter or VPN network?

AS21603 (Universidad La Salle, AC) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS21603?

AS21603 is registered to Universidad La Salle, AC. It announces about 4,608 IPv4 addresses.

How do I detect traffic from AS21603?

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.