Network · AS1251

AS1251 FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO SÃO PAULO

AS1251 (FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO SÃO PAULO) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS1251

OwnerFUNDAÇÃO DE AMPARO À PESQUISA DO ESTAD
KindInternet service provider
Servers, not peopleno
IPv4 addresses121,344
IPv4 ranges37
IPv6 ranges1

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

143.108.0.0/16
200.136.64.0/19
200.18.240.0/20
200.144.32.0/20
200.144.128.0/20
200.136.32.0/20
200.136.160.0/20
200.136.16.0/20
200.19.88.0/21
200.18.56.0/21
200.144.64.0/21
200.144.120.0/21

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

Check an IP address →

Detect it in code

Spot AS1251 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 AS1251

Is AS1251 a datacenter or VPN network?

AS1251 (FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO SÃO PAULO) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS1251?

AS1251 is registered to FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO SÃO PAULO. It announces about 121,344 IPv4 addresses.

How do I detect traffic from AS1251?

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.