Network · AS40510

AS40510 Southern Fiber Worx

AS40510 (Southern Fiber Worx) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS40510

OwnerSouthern Fiber Worx
KindInternet service provider
Servers, not peopleno
IPv4 addresses4,608
IPv4 ranges8
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

170.39.120.0/22
131.143.0.0/22
104.250.244.0/22
38.66.252.0/23
38.66.248.0/24
38.66.233.0/24
38.66.221.0/24
38.29.189.0/24

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

Check an IP address →

Detect it in code

Spot AS40510 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 AS40510

Is AS40510 a datacenter or VPN network?

AS40510 (Southern Fiber Worx) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS40510?

AS40510 is registered to Southern Fiber Worx. It announces about 4,608 IPv4 addresses.

How do I detect traffic from AS40510?

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.