Network · AS11971

AS11971 Pfizer Inc.

AS11971 (Pfizer Inc.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS11971

OwnerPfizer Inc.
KindInternet service provider
Servers, not peopleno
IPv4 addresses55,296
IPv4 ranges15
IPv6 ranges0

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

148.168.128.0/18
148.168.0.0/18
148.168.224.0/19
148.168.192.0/20
148.168.88.0/21
148.168.208.0/21
148.168.84.0/22
148.168.72.0/22
148.168.68.0/22
148.168.220.0/22
148.168.78.0/23
148.168.66.0/23

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

Check an IP address →

Detect it in code

Spot AS11971 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 AS11971

Is AS11971 a datacenter or VPN network?

AS11971 (Pfizer Inc.) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS11971?

AS11971 is registered to Pfizer Inc.. It announces about 55,296 IPv4 addresses.

How do I detect traffic from AS11971?

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.