Network · AS1742

AS1742 Harvard University

AS1742 (Harvard University) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Network check ASN

AS1742

OwnerHarvard University
KindInternet service provider
Servers, not peopleno
IPv4 addresses203,520
IPv4 ranges9
IPv6 ranges3

Risk score0

Nothing suspicious found.

Largest IPv4 ranges

140.247.0.0/16
131.142.0.0/16
128.103.0.0/16
65.112.0.0/20
67.134.204.0/22
199.94.60.0/22
192.54.223.0/24
192.5.66.0/24
192.131.102.0/24

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

Check an IP address →

Detect it in code

Spot AS1742 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 AS1742

Is AS1742 a datacenter or VPN network?

AS1742 (Harvard University) looks like an internet service provider, so its addresses are mostly real home, business or mobile connections.

Who owns AS1742?

AS1742 is registered to Harvard University. It announces about 203,520 IPv4 addresses.

How do I detect traffic from AS1742?

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.