Network · AS19312

AS19312 John Muir Health

AS19312 (John Muir Health) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS19312

OwnerJohn Muir Health
KindInternet service provider
Servers, not peopleno
IPv4 addresses768
IPv4 ranges3
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

50.59.177.0/24
206.107.211.0/24
12.25.162.0/24

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

Check an IP address →

Detect it in code

Spot AS19312 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 AS19312

Is AS19312 a datacenter or VPN network?

AS19312 (John Muir Health) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS19312?

AS19312 is registered to John Muir Health. It announces about 768 IPv4 addresses.

How do I detect traffic from AS19312?

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.