Network · AS138644

AS138644 FASTMOS CO., LIMITED

AS138644 (FASTMOS CO., LIMITED) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS138644

OwnerFASTMOS CO., LIMITED
KindInternet service provider
Servers, not peopleno
IPv4 addresses9,216
IPv4 ranges4
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

191.124.208.0/20
191.124.224.0/21
191.124.200.0/21
191.124.232.0/22

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

Check an IP address →

Detect it in code

Spot AS138644 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 AS138644

Is AS138644 a datacenter or VPN network?

AS138644 (FASTMOS CO., LIMITED) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS138644?

AS138644 is registered to FASTMOS CO., LIMITED. It announces about 9,216 IPv4 addresses.

How do I detect traffic from AS138644?

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.