Network · AS637

AS637 DoD Network Information Center

AS637 (DoD Network Information Center) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS637

OwnerDoD Network Information Center
KindInternet service provider
Servers, not peopleno
IPv4 addresses923,904
IPv4 ranges239
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

158.236.0.0/15
158.245.0.0/16
158.238.0.0/16
138.168.0.0/16
138.158.0.0/16
138.156.0.0/16
205.109.128.0/17
158.244.0.0/17
158.243.0.0/17
158.239.128.0/17
214.44.192.0/18
158.244.128.0/18

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

Check an IP address →

Detect it in code

Spot AS637 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 AS637

Is AS637 a datacenter or VPN network?

AS637 (DoD Network Information Center) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS637?

AS637 is registered to DoD Network Information Center. It announces about 923,904 IPv4 addresses.

How do I detect traffic from AS637?

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.