indexo.dev

duhovkagymnazium.cz

.cz crawl

First seen 2026-05-31 · Last seen 2026-06-02 · ok HTTP/1.1 200 888 ms crawled 2026-06-01

CZ · 95.168.220.117 · AS39392 SH.cz s.r.o.

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title
Osmileté gymnázium Duhovka | Osmileté soukromé gymnázium Praha
Description
Gymnázium Duhovka je soukromé česko-anglické montessori gymnázium v Praze. Studujte osmileté gymnázium s českou maturitou či IB program. Nabízíme dálkové čtyřleté studium s maturitou dálkově.
Language
cs-CZ

Technology

Server
Apache
Stack
PHP
Analytics
  • Google Tag Manager
Fonts
  • Google Fonts

Third-party hosts loaded (3)

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

Social

Contact

Email
Phone

Registration

Registrar
REG-ZONER
Created
2010-04-27
Expires
2028-04-26 693 days left
Updated
2019-05-03
Name servers
  • ns1.regzone.cz
  • ns1.regzone.de
  • ns1.regzone.info

DNS records live

NS
  • ns1.regzone.cz
  • ns1.regzone.de
  • ns1.regzone.info
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
v=spf1 mx a:vs10.abtera.cz a:vs6.abtera.cz a:ms.dacc.cz a:smtp.dacc.cz include:_spf.google.com ~all
softfail (~all)
DMARC
not published
DKIM
no key found at common selectors

Certificate (current)

R12
from 2026-05-23 to 2026-08-21
Expires in 79 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 40/100 Checked live page: https://www.duhovkagymnazium.cz/osmilete-gymnazium-praha

present
  • x-frame-options
findings
  • missing HSTS
  • missing Content Security Policy
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy
Header values
x-frame-options
SAMEORIGIN

Links to (9)

Linked from (5)