Network · AS3377

AS3377 Verizon Business

AS3377 (Verizon Business) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS3377

OwnerVerizon Business
KindInternet service provider
Servers, not peopleno
IPv4 addresses78,336
IPv4 ranges4
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

131.146.0.0/16
166.58.0.0/19
166.58.32.0/20
166.44.240.0/23

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

Check an IP address →

Detect it in code

Spot AS3377 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 AS3377

Is AS3377 a datacenter or VPN network?

AS3377 (Verizon Business) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS3377?

AS3377 is registered to Verizon Business. It announces about 78,336 IPv4 addresses.

How do I detect traffic from AS3377?

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.