Network · AS81

AS81 MCNC

AS81 (MCNC) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS81

OwnerMCNC
KindInternet service provider
Servers, not peopleno
IPv4 addresses1,946,624
IPv4 ranges123
IPv6 ranges66

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

152.8.0.0/14
152.48.0.0/15
152.46.0.0/15
152.28.0.0/15
152.20.0.0/15
152.60.0.0/16
152.6.0.0/16
152.54.0.0/16
152.45.0.0/16
152.4.0.0/16
152.30.0.0/16
152.18.0.0/16

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

Check an IP address →

Detect it in code

Spot AS81 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 AS81

Is AS81 a datacenter or VPN network?

AS81 (MCNC) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS81?

AS81 is registered to MCNC. It announces about 1,946,624 IPv4 addresses.

How do I detect traffic from AS81?

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.