Network · AS19355

AS19355 San Mateo Regional Network, Inc.

AS19355 (San Mateo Regional Network, Inc.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS19355

OwnerSan Mateo Regional Network, Inc.
KindInternet service provider
Servers, not peopleno
IPv4 addresses4,608
IPv4 ranges6
IPv6 ranges1

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

209.234.96.0/21
209.234.108.0/22
209.234.106.0/23
199.181.122.0/23
209.234.104.0/24
198.180.184.0/24

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

Check an IP address →

Detect it in code

Spot AS19355 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 AS19355

Is AS19355 a datacenter or VPN network?

AS19355 (San Mateo Regional Network, Inc.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS19355?

AS19355 is registered to San Mateo Regional Network, Inc.. It announces about 4,608 IPv4 addresses.

How do I detect traffic from AS19355?

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.