Network · AS273930

AS273930 ALONSO JOSE DARIO (SF PLUS!)

AS273930 (ALONSO JOSE DARIO (SF PLUS!)) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS273930

  • OwnerALONSO JOSE DARIO (SF PLUS!)
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses256
  • IPv4 ranges1
  • IPv6 ranges1
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 38.156.16.0/24

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

Check an IP address →

Detect it in code

Spot AS273930 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 AS273930

Is AS273930 a datacenter or VPN network?

AS273930 (ALONSO JOSE DARIO (SF PLUS!)) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS273930?

AS273930 is registered to ALONSO JOSE DARIO (SF PLUS!). It announces about 256 IPv4 addresses.

How do I detect traffic from AS273930?

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.