Network · AS56

AS56 United States Department of Defense (DoD)

AS56 (United States Department of Defense (DoD)) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS56

  • OwnerUnited States Department of Defense (D
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses7,774,720
  • IPv4 ranges446
  • IPv6 ranges0
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 137.240.0.0/14
  • 132.32.0.0/14
  • 143.144.0.0/15
  • 132.8.0.0/15
  • 132.48.0.0/15
  • 132.46.0.0/15
  • 132.40.0.0/15
  • 132.4.0.0/15
  • 132.36.0.0/15
  • 132.26.0.0/15
  • 132.22.0.0/15
  • 132.18.0.0/15

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

Check an IP address →

Detect it in code

Spot AS56 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 AS56

Is AS56 a datacenter or VPN network?

AS56 (United States Department of Defense (DoD)) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS56?

AS56 is registered to United States Department of Defense (DoD). It announces about 7,774,720 IPv4 addresses.

How do I detect traffic from AS56?

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.