Network · AS18438

AS18438 Brown Brothers Harriman & Company

AS18438 (Brown Brothers Harriman & Company) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS18438

  • OwnerBrown Brothers Harriman & Company
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses5,120
  • IPv4 ranges9
  • IPv6 ranges0
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 204.136.24.0/21
  • 192.200.4.0/22
  • 192.200.2.0/23
  • 204.136.23.0/24
  • 204.136.20.0/24
  • 204.136.19.0/24
  • 204.136.16.0/24
  • 192.200.8.0/24
  • 192.200.1.0/24

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

Check an IP address →

Detect it in code

Spot AS18438 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 AS18438

Is AS18438 a datacenter or VPN network?

AS18438 (Brown Brothers Harriman & Company) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS18438?

AS18438 is registered to Brown Brothers Harriman & Company. It announces about 5,120 IPv4 addresses.

How do I detect traffic from AS18438?

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.