indexo.dev

arg.cz

.cz crawl

First seen 2026-05-16 · Last seen 2026-05-20 · ok HTTP/1.1 200 8615 ms crawled 2026-05-20

CZ · 217.11.227.76 · AS15685 CASABLANCA INT a.s.

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title
Asociace ředitelů gymnázií ČR
Description
Informace, dokumenty, konference a podpora pro ředitele a vedení gymnázií v celé republice. Členy AŘG jsou tedy fyzické osoby – nikoli školy.
Language
cs
Feeds

Technology

Server
Apache
jQuery
3.0.0 known XSS (<3.5)
Stack
PHP
Fonts
  • Google Fonts

Third-party hosts loaded (4)

  • cdn.antee.cz×2
  • fonts.googleapis.com×2
  • fonts.gstatic.com×1
  • www.google.com×1

Contact

Phone

Registration

Registrar
REG-INTERNET-CZ
Created
1998-01-28
Expires
2031-10-05 1963 days left
Updated
2025-12-08
Name servers
  • ns1.antee.cz
  • ns2.antee.cz

DNS records live

NS
  • ns1.antee.cz
  • ns2.antee.cz
MX
  • 10 mail.antee.cz
  • 20 backup.antee.cz

Email authentication weak

SPF
v=spf1 include:spf.antee.cz ~all
softfail (~all)
DMARC
not published
DKIM
  • mail: v=DKIM1; g=*; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDodNvKsACKgt2k1SG0ShRq/YS/mNalYsXg/G//cfZzUrqVi0fQ84UolRMpu1LJo3tM/bRgXitGCEfy3…
selectors probed

Certificate (current)

R13
from 2026-04-13 to 2026-07-12
Expires in 52 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 45/100 Checked live page: https://www.arg.cz/

present
  • strict-transport-security
findings
  • short HSTS max-age
  • missing Content Security Policy
  • missing frame protection
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy
Header values
strict-transport-security
max-age=2592000

Links to (2)

Linked from (1)