Network · AS131937

AS131937 Joetsu Cable Vision

AS131937 (Joetsu Cable Vision) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS131937

OwnerJoetsu Cable Vision
KindInternet service provider
Servers, not peopleno
IPv4 addresses33,280
IPv4 ranges9
IPv6 ranges2

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

170.249.96.0/19
126.251.128.0/19
126.251.0.0/19
170.249.64.0/21
126.251.32.0/21
126.251.112.0/21
202.223.12.0/22
103.118.92.0/22
103.152.66.0/23

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

Check an IP address →

Detect it in code

Spot AS131937 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 AS131937

Is AS131937 a datacenter or VPN network?

AS131937 (Joetsu Cable Vision) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS131937?

AS131937 is registered to Joetsu Cable Vision. It announces about 33,280 IPv4 addresses.

How do I detect traffic from AS131937?

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.