rk-sedlacek.cz

.cz crawl

First seen 2026-05-31 · Last seen 2026-05-31 · ok HTTP/1.1 200 570 ms crawled 2026-06-01

DE · 64.225.92.31 · AS14061 DigitalOcean, LLC

Reputation 89/100 weak security headers dmarc monitor-only

Classifying

HTML metadata

Title: Vítejte! | RK Sedláček
Language: cs

Technology

Server: Apache
jQuery: 3.1.1 known XSS (<3.5)
Stack: PHP

Analytics

Google Tag Manager

Fonts

Google Fonts

Third-party hosts loaded (4)

cemap.cz×1
fonts.googleapis.com×1
translate.google.com×1
www.googletagmanager.com×1

Social

Contact

Phone

774604327

DNS records live

NS

ns1.topweby.cz
ns2.topweby.cz

MX

10 mail.rk-sedlacek.cz

Email authentication partial

SPF: v=spf1 a mx include:spf.smartemailing.cz ip4:109.123.219.218 ip4:109.123.219.217 ip4:109.123.219.206 ip4:81.0.213.194 ip6:2001:1528:178:a::194 -all
strict (-all)
DMARC: v=DMARC1; p=none; rua=mailto:dmarc+608132@smartemailing.cz; fo=1
policy: none (monitoring only)
DKIM: no key found at common selectors

Certificate (current)

R12

from 2026-05-12 to 2026-08-10

Expires in 69 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://rk-sedlacek.cz/

findings

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

Links to (4)

Linked from (5)