indexo.dev

redbutton.cz

.cz crawl

First seen 2026-05-11 · Last seen 2026-05-16 · ok HTTP/1.1 200 9210 ms crawled 2026-05-16

CZ · 185.59.208.137 · AS43541 VSHosting s.r.o.

Reputation 94/100 dmarc monitor-only

Classifying

HTML metadata

Title
Home | Red Button
Description
Jsme síť lidí přiravených sdílet své know-how. Pomáháme leaderům naplno rozvíjet potenciál všech lidí ve firmě, inspirujeme a propojujeme lidi mezi sebou, sledujeme nejnovější trendy.
Language
en

Open Graph

url
https://www.redbutton.cz
title
Home | Red Button
site name
Red Button

Technology

Fonts
  • Google Fonts

Third-party hosts loaded (4)

  • zoom.rba.cz×44
  • cdn.solidpixels.com×1
  • cloud.typography.com×1
  • fonts.googleapis.com×1

Registration

Registrar
REG-ACTIVE24
Created
2009-05-05
Expires
2027-05-04 348 days left
Updated
2025-11-26
Name servers
  • ns1.websupport.cz
  • ns2.websupport.cz
  • ns3.websupport.eu

DNS records live

NS
  • ns1.websupport.cz
  • ns2.websupport.cz
  • ns3.websupport.eu
MX
  • 1 aspmx.l.google.com
  • 10 alt3.aspmx.l.google.com
  • 10 alt4.aspmx.l.google.com
  • 5 alt1.aspmx.l.google.com
  • 5 alt2.aspmx.l.google.com
Verified for
  • Atlassian
  • Google

Email authentication partial

SPF
v=spf1 a mx include:spf.smartemailing.cz ~all
softfail (~all)
DMARC
v=DMARC1; p=none; rua=mailto:dmarc+672211@smartemailing.cz; fo=1
policy: none (monitoring only)
DKIM
  • google: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA0gZ3wvUPTqGkXS8a4WFP3kuWXq+7NXy0/Z27cGTxoPkYZOPvoNiUAZhB8NsDO5tpU7WsplYPBi2zkR…
  • k2: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAv2aC2KjGKLOwTweBY5A9RpjsxaBXR9r7OAU6U8/zn92ivImI75naUujWbItRI/QmL1jy5PWGqLwoUA…
selectors probed

Certificate (current)

E8
from 2026-04-28 to 2026-07-27
Expires in 67 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 65/100 Checked live page: https://www.redbutton.cz/en

present
  • strict-transport-security
  • x-content-type-options
  • referrer-policy
findings
  • missing Content Security Policy
  • missing frame protection
  • missing Permissions Policy
Header values
referrer-policy
no-referrer-when-downgrade
x-content-type-options
nosniff
strict-transport-security
max-age=63072000; includeSubDomains; preload

Links to (1)

Linked from (1)