johnquah.com

.com crawl

First seen 2026-05-12 · Last seen 2026-05-18 · ok HTTP/1.1 200 1980 ms crawled 2026-05-18

US · 199.34.228.138 · AS27647 Weebly, Inc.

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title
Home
Language
en

Open Graph

url
https://www.johnquah.com/
title
My Site
description
Distinguished Professor National University of Singapore

Technology

CDN
Cloudflare

Third-party hosts loaded (1)

  • cdn2.editmysite.com×17

Contact

Address
rd Economics Discussion Papers, February 2023

Registration

Registrar
Register.com - Network Solutions, LLC
Created
2016-03-17
Expires
2028-03-17 668 days left
Updated
2026-03-04
Name servers
  • dns1.register.com
  • dns2.register.com

DNS records live

NS
  • dns016.c.register.com
  • dns029.a.register.com
  • dns099.b.register.com
  • dns177.d.register.com
MX
Show 7 MX records
  • 10 aspmx.l.google.com
  • 20 alt1.aspmx.l.google.com
  • 20 alt2.aspmx.l.google.com
  • 30 aspmx2.googlemail.com
  • 30 aspmx3.googlemail.com
  • 30 aspmx4.googlemail.com
  • 30 aspmx5.googlemail.com

Email authentication weak

SPF
not published
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

R12
from 2026-03-07 to 2026-06-05
Expires in 17 days

HTTP security headers

Header hygiene 30/100 Checked live page: https://www.johnquah.com/

findings
  • missing HSTS
  • missing Content Security Policy
  • missing frame protection
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy

Links to (4)