indexo.dev

21zsplzen.cz

.cz crawl

First seen 2026-05-31 · Last seen 2026-06-01 · ok HTTP/1.1 200 325 ms crawled 2026-06-01

CZ · 62.109.155.43 · AS29134 Webglobe, s.r.o.

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title
Úvodní strana | 21. ZŠ Plzeň
Description
Oficiální stránky 21. základní školy Plzeň
Language
cs

Technology

Server
nginx
jQuery
3.3.1 known XSS (<3.5)
Stack
PHP
Fonts
  • Google Fonts

Third-party hosts loaded (2)

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

Contact

Phone

Registration

Registrar
REG-INTERNET-CZ
Created
2006-08-30
Expires
2026-08-29 87 days left
Updated
2013-12-27
Name servers
  • ns1.savana.cz
  • ns2.savana.cz
  • ns3.savana.cz

DNS records live

NS
  • ns1.savana.cz
  • ns2.savana.cz
  • ns3.savana.cz
MX
  • 10 mx1.savana.cz
  • 20 mx2.savana.cz

Email authentication weak

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

Certificate (current)

R13
from 2026-03-19 to 2026-06-17
Expires in 15 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://21zsplzen.cz/

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

Links to (10)

Linked from (2)