Network · AS39931

AS39931 FRANCHE COMTE NET SAS

AS39931 (FRANCHE COMTE NET SAS) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS39931

OwnerFRANCHE COMTE NET SAS
KindInternet service provider
Servers, not peopleno
IPv4 addresses5,120
IPv4 ranges2
IPv6 ranges1

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

77.245.128.0/20
185.172.12.0/22

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

Check an IP address →

Detect it in code

Spot AS39931 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 AS39931

Is AS39931 a datacenter or VPN network?

AS39931 (FRANCHE COMTE NET SAS) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS39931?

AS39931 is registered to FRANCHE COMTE NET SAS. It announces about 5,120 IPv4 addresses.

How do I detect traffic from AS39931?

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.