indexo.dev

257.cz

.cz crawl

First seen 2026-05-30 · Last seen 2026-06-01 · ok HTTP/1.1 200 267 ms crawled 2026-05-31

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

Reputation 94/100 dmarc monitor-only

Classifying

HTML metadata

Title
257.cz - Domény, expirované domény
Description
Expirované domény .cz

Technology

Server
nginx

Third-party hosts loaded (2)

  • cdn.jsdelivr.net×1
  • cdn.mathjax.org×1

Contact

Email

DNS records live

NS
  • ns1.257.cz
  • ns2.257.cz
MX
  • 10 mail.shy.cz
Verified for
  • Google

Email authentication partial

SPF
v=spf1 include:_spf.shy.cz include:_spf.google.com ~all
softfail (~all)
DMARC
v=DMARC1; p=none; rua=mailto:dmarc.rua@257.cz
policy: none (monitoring only)
DKIM
no key found at common selectors

Certificate (current)

R12
from 2026-05-27 to 2026-08-25
Expires in 82 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 50/100 Checked live page: https://257.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; preload

Linked from (2)