indexo.dev

deltazero.cz

.cz crawl

First seen 2026-06-03 · Last seen 2026-06-04 · ok HTTP/1.1 200 122 ms crawled 2026-06-03

CZ · 85.118.129.3 · AS24971 MasterDC s.r.o.

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title
ΔO [delta zero] kreativní programování
Description
vývoj informačních systémů pro organizaci a automatizaci práce
Language
cs-CZ

Technology

Server
Apache
CMS
Next.js
JS framework
Next.js, React
Fonts
  • Google Fonts

Third-party hosts loaded (1)

  • fonts.gstatic.com×1

Social

Registration

Registrar
REG-SEZNAM
Created
2019-06-05
Expires
2027-06-04 364 days left
Updated
2019-10-15
Name servers
  • ams.emailprofi.cz
  • ans.emailprofi.cz

DNS records live

NS
  • ams.emailprofi.cz
  • ans.emailprofi.cz
MX
  • 10 0ef28b6642349642.mx1.emailprofi.seznam.cz
  • 20 0ef28b6642349642.mx2.emailprofi.seznam.cz
TXT
  • DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=emailprofi.seznam.cz;

Email authentication weak

SPF
v=spf1 include:spf.seznam.cz ~all
softfail (~all)
DMARC
not published
DKIM
  • s1: k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA7QqmpwWRP5NKq+0VYHMV1jPiXIUpd8HxusP5STETVxXaX785F5NnnDXItZ0FBSGCuqLro6mJG5sQyAJG0w…
  • s2: k=rsa; t=s; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC0fP8uGRpIeraS9mdwMtmjRQ9fgxGnOZYmayAbuklK+C/33PEvdwd8EXR3LjwPp0MhnWvhxVluLLVJlJTaLpQrMf…
selectors probed

Certificate (current)

R13
from 2026-04-08 to 2026-07-07
Expires in 33 days

Full certificate history on crt.sh ↗

HTTP security headers

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

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

Links to (21)

Linked from (3)