Network · AS5371

AS5371 DoD Network Information Center

AS5371 (DoD Network Information Center) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS5371

OwnerDoD Network Information Center
KindInternet service provider
Servers, not peopleno
IPv4 addresses193,536
IPv4 ranges133
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

205.73.128.0/19
205.71.128.0/19
205.68.224.0/19
205.56.0.0/19
205.99.96.0/20
205.98.128.0/20
205.94.160.0/20
205.92.16.0/20
205.91.96.0/20
205.91.0.0/20
205.90.224.0/20
205.90.192.0/20

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

Check an IP address →

Detect it in code

Spot AS5371 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 AS5371

Is AS5371 a datacenter or VPN network?

AS5371 (DoD Network Information Center) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS5371?

AS5371 is registered to DoD Network Information Center. It announces about 193,536 IPv4 addresses.

How do I detect traffic from AS5371?

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.