Network · AS400273

AS400273 Johnstone Supply, LLC

AS400273 (Johnstone Supply, LLC) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS400273

  • OwnerJohnstone Supply, LLC
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses256
  • IPv4 ranges1
  • IPv6 ranges0
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 8.41.137.0/24

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

Check an IP address →

Detect it in code

Spot AS400273 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 AS400273

Is AS400273 a datacenter or VPN network?

AS400273 (Johnstone Supply, LLC) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS400273?

AS400273 is registered to Johnstone Supply, LLC. It announces about 256 IPv4 addresses.

How do I detect traffic from AS400273?

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.