zikum.cz

.cz dns crawl

First seen 2026-06-02 · Last seen 2026-06-04 · ok HTTP/1.1 200 660 ms crawled 2026-06-02

DE · 141.144.239.80 · AS31898 Oracle Corporation

Reputation 95/100 weak security headers

Classifying

HTML metadata

Title

ZIKUM

Language

Generator

WordPress 7.0

Canonical

https://zikum.cz/

Translations

Technology

Server: nginx
CMS: WordPress 7.0
jQuery: 3.7.1
Stack: PHP

Fonts

Google Fonts

Third-party hosts loaded (1)

fonts.googleapis.com×1

Social

Contact

Phone

2026-04-21 15

DNS records live

NS

ns.gransy.com
ns2.gransy.com
ns3.gransy.com
ns4.gransy.com
ns5.gransy.com

MX

10 zmail.zikum.cz
20 zmail2.zikum.cz
30 zmail3.zikum.cz

Verified for

Google

Email authentication strong

SPF

v=spf1 a mx ip4:95.168.200.224/28 ip4:95.168.204.224/27 ip4:95.168.206.224/27 -all

strict (-all)

DMARC

v=DMARC1; p=reject; adkim=s; aspf=s; sp=reject; rua=mailto:dmarc@zikum.cz; ruf=mailto:dmarc@zikum.cz; rf=afrf; pct=100; ri=86400;

policy: reject (enforced) · sp=reject

DKIM

default: v=DKIM1;g=*;k=rsa;p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyQB0ebsBMCHnlHXR1nPyfKMUQ2pmFbDvf/r6i1ieUKRF179CbLEz3QOM0ULBvCZOoIT0oUkZn0om…
mail: v=DKIM1;p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAscLrvUFUS80Y/mijwcEUvBGqE2KBS16U3EBP/V88N2AYq7xIpaf3sMVMTEe/XRXkYZo9EjMzSqhoW2qABOEixF…

selectors probed

Certificate (current)

R12

from 2026-04-04 to 2026-07-03

Expires in 28 days

Full certificate history on crt.sh ↗

HTTP security headers

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

findings

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