indexo.dev

don.cz

.cz dns

First seen 2026-06-03 · Last seen 2026-06-04 · ok HTTP/1.1 200 247 ms crawled 2026-06-04

CZ · 194.228.50.10 · AS5610 O2 Czech Republic, a.s.

Reputation 95/100 weak security headers

Classifying

HTML metadata

Title
DON.cz

Technology

Server
nginx
PHP
4.3.8 end of life

Registration

Registrar
REG-MIRAMO
Created
1999-12-29
Expires
2027-01-04 213 days left
Updated
2013-11-20
Name servers
  • ns2.don.cz
  • ns.don.cz

DNS records live

NS
  • ns.don.cz
  • ns2.don.cz
MX
  • 10 mx.don.cz
  • 20 mx2.don.cz

Email authentication strong

SPF
v=spf1 +a +mx +ip4:194.228.50.10 +ip4:194.228.50.11 ~all
softfail (~all)
DMARC
v=DMARC1; p=quarantine; pct=100; rua=mailto:postmaster@don.cz
policy: quarantine
DKIM
no key found at common selectors

Certificate (current)

R12
from 2026-04-19 to 2026-07-18
Expires in 44 days

Full certificate history on crt.sh ↗

HTTP security headers

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

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