Network · AS23520

AS23520 Columbus Networks USA, Inc.

AS23520 (Columbus Networks USA, Inc.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS23520

OwnerColumbus Networks USA, Inc.
KindInternet service provider
Servers, not peopleno
IPv4 addresses155,136
IPv4 ranges124
IPv6 ranges2

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

72.252.64.0/19
69.79.32.0/19
69.79.128.0/19
67.230.0.0/19
190.242.224.0/19
72.252.48.0/20
69.79.240.0/20
69.79.160.0/20
67.230.96.0/20
63.245.32.0/20
190.242.192.0/20
72.252.40.0/21

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

Check an IP address →

Detect it in code

Spot AS23520 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 AS23520

Is AS23520 a datacenter or VPN network?

AS23520 (Columbus Networks USA, Inc.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS23520?

AS23520 is registered to Columbus Networks USA, Inc.. It announces about 155,136 IPv4 addresses.

How do I detect traffic from AS23520?

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.