Network · AS138

AS138 United States Department of Defense (DoD)

AS138 (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

AS138

OwnerUnited States Department of Defense (D
KindInternet service provider
Servers, not peopleno
IPv4 addresses43,008
IPv4 ranges17
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

141.234.0.0/17
144.183.200.0/21
144.183.32.0/22
144.183.196.0/22
144.183.128.0/22
131.66.48.0/22
131.66.44.0/22
144.183.16.0/23
131.66.250.0/23
144.183.227.0/24
144.183.216.0/24
144.183.20.0/24

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

Check an IP address →

Detect it in code

Spot AS138 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 AS138

Is AS138 a datacenter or VPN network?

AS138 (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 AS138?

AS138 is registered to United States Department of Defense (DoD). It announces about 43,008 IPv4 addresses.

How do I detect traffic from AS138?

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.