indexo.dev

t4d.cz

.cz crawl

First seen 2026-06-01 · Last seen 2026-06-01 · ok HTTP/1.1 200 473 ms crawled 2026-06-01

CZ · 37.205.13.38 · AS24971 MasterDC s.r.o.

Reputation 94/100 dmarc monitor-only

Classifying

HTML metadata

Title
Index - T4D
Description
Freelance programmer group. C, C++, Java, HTML5, JavaScript, NodeJS, IoJS, PHP, Python, Perl, bash, awk, AVR, Server Management, Software a Web, Hardware, Data Mining, Reverse Engineering, Consulting
Language
cs

Technology

Server
nginx
jQuery
1.11.0 known XSS (<3.5)
Fonts
  • Google Fonts

Third-party hosts loaded (1)

  • fonts.googleapis.com×1

Social

Contact

Email

DNS records live

NS
  • ns1.shy.cz
  • ns2.shy.cz
MX
  • 10 mail.shy.cz
TXT
  • chal=z0jgpf
  • t-verify=82686b3bad0cb78a51241b00b5487f37
  • protonmail-verification=4b01e8648a36bfac686149d2660032cc44ae07a1
Verified for
  • Google

Email authentication partial

SPF
v=spf1 include:_spf.shy.cz include:_spf.google.com include:_spf.protonmail.ch include:spf.tutanota.de ~all
softfail (~all)
DMARC
v=DMARC1; p=none; rua=mailto:dmarc.rua@t4d.cz
policy: none (monitoring only)
DKIM
no key found at common selectors

Certificate (current)

R13
from 2026-04-06 to 2026-07-05
Expires in 31 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 50/100 Checked live page: https://t4d.cz/

present
  • strict-transport-security
findings
  • missing Content Security Policy
  • missing frame protection
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy
Header values
strict-transport-security
max-age=31536000; includeSubDomains

Links to (2)

Linked from (1)