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

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

Full certificate history on crt.sh ↗

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