Network · AS22121

AS22121 Topsham Communications LLC

AS22121 (Topsham Communications LLC) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS22121

OwnerTopsham Communications LLC
KindInternet service provider
Servers, not peopleno
IPv4 addresses3,328
IPv4 ranges3
IPv6 ranges1

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

199.21.136.0/21
172.99.224.0/22
38.56.71.0/24

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

Check an IP address →

Detect it in code

Spot AS22121 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 AS22121

Is AS22121 a datacenter or VPN network?

AS22121 (Topsham Communications LLC) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS22121?

AS22121 is registered to Topsham Communications LLC. It announces about 3,328 IPv4 addresses.

How do I detect traffic from AS22121?

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.