Network · AS203501

AS203501 Emarsys North America, Inc

AS203501 (Emarsys North America, Inc) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS203501

OwnerEmarsys North America, Inc
KindInternet service provider
Servers, not peopleno
IPv4 addresses5,376
IPv4 ranges7
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

89.37.88.0/22
45.87.196.0/22
45.86.116.0/22
185.90.20.0/22
83.68.134.0/23
194.113.26.0/23
45.91.45.0/24

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

Check an IP address →

Detect it in code

Spot AS203501 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 AS203501

Is AS203501 a datacenter or VPN network?

AS203501 (Emarsys North America, Inc) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS203501?

AS203501 is registered to Emarsys North America, Inc. It announces about 5,376 IPv4 addresses.

How do I detect traffic from AS203501?

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.