Network · AS1661

AS1661 Verizon Business

AS1661 (Verizon Business) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS1661

  • OwnerVerizon Business
  • KindInternet service provider
  • Servers, not peopleno
  • IPv4 addresses11,008
  • IPv4 ranges26
  • IPv6 ranges0
Risk score0

Nothing suspicious found.

Largest IPv4 ranges

  • 65.243.172.0/23
  • 65.217.40.0/23
  • 65.211.120.0/23
  • 65.210.178.0/23
  • 65.203.146.0/23
  • 63.97.104.0/23
  • 63.87.16.0/23
  • 63.77.76.0/23
  • 63.118.90.0/23
  • 63.118.0.0/23
  • 63.110.102.0/23
  • 212.136.178.0/23

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

Check an IP address →

Detect it in code

Spot AS1661 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 AS1661

Is AS1661 a datacenter or VPN network?

AS1661 (Verizon Business) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS1661?

AS1661 is registered to Verizon Business. It announces about 11,008 IPv4 addresses.

How do I detect traffic from AS1661?

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.