Network · AS396921

AS396921 U.S. Customs and Border Protection

AS396921 (U.S. Customs and Border Protection) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS396921

  • OwnerU.S. Customs and Border Protection
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses3,328
  • IPv4 ranges11
  • IPv6 ranges1
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 167.144.68.0/23
  • 167.144.64.0/23
  • 167.144.70.0/24
  • 167.144.66.0/24
  • 167.144.26.0/24
  • 167.144.25.0/24
  • 167.144.2.0/24
  • 167.144.130.0/24
  • 167.144.12.0/24
  • 167.144.11.0/24
  • 167.144.1.0/24

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

Check an IP address →

Detect it in code

Spot AS396921 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 AS396921

Is AS396921 a datacenter or VPN network?

AS396921 (U.S. Customs and Border Protection) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS396921?

AS396921 is registered to U.S. Customs and Border Protection. It announces about 3,328 IPv4 addresses.

How do I detect traffic from AS396921?

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.