Network · AS21725

AS21725 Ritter Communications

AS21725 (Ritter Communications) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS21725

  • OwnerRitter Communications
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses4,096
  • IPv4 ranges11
  • IPv6 ranges0
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 74.221.8.0/23
  • 74.221.12.0/23
  • 64.178.188.0/23
  • 64.178.182.0/23
  • 64.178.178.0/23
  • 74.221.14.0/24
  • 74.221.10.0/24
  • 64.178.186.0/24
  • 64.178.181.0/24
  • 64.178.177.0/24
  • 207.65.46.0/24

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

Check an IP address →

Detect it in code

Spot AS21725 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 AS21725

Is AS21725 a datacenter or VPN network?

AS21725 (Ritter Communications) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS21725?

AS21725 is registered to Ritter Communications. It announces about 4,096 IPv4 addresses.

How do I detect traffic from AS21725?

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.