indexo.dev

davidcrystal.com

.com crawl

First seen 2026-05-15 · Last seen 2026-05-15 · ok HTTP/1.1 200 690 ms crawled 2026-05-19

CZ · 193.105.159.173 · AS24806 INTERNET CZ, a.s.

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title
David Crystal – Home
Description
prof. David Crystal

Technology

Server
Microsoft-IIS
Analytics
  • Google Tag Manager
Fonts
  • Google Fonts

Third-party hosts loaded (2)

  • fonts.googleapis.com×2
  • www.googletagmanager.com×1

Social

Registration

Registrar
123-Reg Limited
Created
2001-01-24
Expires
2027-01-24 249 days left
Updated
2025-01-29
Name servers
  • ns51.domaincontrol.com
  • ns52.domaincontrol.com

DNS records live

NS
  • ns51.domaincontrol.com
  • ns52.domaincontrol.com
MX
  • 10 mxavas.forpsi.com

Email authentication weak

SPF
v=spf1 a mx include:_spf.forpsi.com ~all
softfail (~all)
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

R12
from 2026-04-27 to 2026-07-26
Expires in 67 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://davidcrystal.com/GBR/David-Crystal

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

Links to (9)

Linked from (1)