indexo.dev

cloverleaf.cz

.cz crawl

First seen 2026-05-23 · Last seen 2026-05-31 · ok HTTP/1.1 200 4431 ms crawled 2026-05-28

CZ · 81.91.222.55 · AS39817 OvaNet, a.s.

Reputation 89/100 weak security headers dmarc monitor-only

sector education type homepage

HTML metadata

Title
/ Jazyková škola Ostrava | Jazykové kurzy angličtiny | Cloverleaf
Description
Tradice a záruka kvality – jsme největší jazyková škola v regionu
Language
cs

Technology

Server
openresty
PHP
7.2.24 end of life
Analytics
  • Google Tag Manager

Third-party hosts loaded (5)

  • www.googletagmanager.com×3
  • www.issa.cz×2
  • c.seznam.cz×1
  • maps.google.com×1
  • www.facebook.com×1

Social

Contact

Email
Phone

Registration

Registrar
REG-ZONER
Created
1998-04-21
Expires
2026-10-10 131 days left
Updated
2024-06-18
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
  • 10 138ca019c475b4e6.mx1.emailprofi.seznam.cz
  • 10 138ca019c475b4e6.mx2.emailprofi.seznam.cz

Email authentication partial

SPF
v=spf1 a mx include:sparkpostmail.com ip4:81.91.222.4 ?all
neutral (?all)
DMARC
v=DMARC1; p=none; rua=mailto:cbe60epln7@dmarc-reports.ecomailapp.com; fo=1; ri=86400;
policy: none (monitoring only)
DKIM
no key found at common selectors

Certificate (current)

E7
from 2026-04-13 to 2026-07-12
Expires in 41 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 40/100 Checked live page: https://www.cloverleaf.cz/

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 (2)