Network · AS51815

AS51815 Kustbandet AB

AS51815 (Kustbandet AB) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS51815

OwnerKustbandet AB
KindInternet service provider
Servers, not peopleno
IPv4 addresses14,336
IPv4 ranges17
IPv6 ranges7

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

176.56.240.0/20
91.190.136.0/21
78.108.48.0/21
185.31.196.0/22
185.196.152.0/22
185.170.180.0/22
62.102.148.0/23
91.226.180.0/24
91.226.177.0/24
91.209.88.0/24
91.208.81.0/24
62.102.151.0/24

Ranges and owner from DB-IP (CC BY 4.0), updated 2026-10-22.

Check an IP address →

Detect it in code

Spot AS51815 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 AS51815

Is AS51815 a datacenter or VPN network?

AS51815 (Kustbandet AB) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS51815?

AS51815 is registered to Kustbandet AB. It announces about 14,336 IPv4 addresses.

How do I detect traffic from AS51815?

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.