Network · AS21778

AS21778 Dimension Data North America, Inc.

AS21778 (Dimension Data North America, Inc.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS21778

OwnerDimension Data North America, Inc.
KindInternet service provider
Servers, not peopleno
IPv4 addresses1,536
IPv4 ranges5
IPv6 ranges1

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

204.2.200.0/23
204.56.94.0/24
129.250.40.0/24
129.250.161.0/24
128.241.34.0/24

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

Check an IP address →

Detect it in code

Spot AS21778 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 AS21778

Is AS21778 a datacenter or VPN network?

AS21778 (Dimension Data North America, Inc.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS21778?

AS21778 is registered to Dimension Data North America, Inc.. It announces about 1,536 IPv4 addresses.

How do I detect traffic from AS21778?

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.