cesnet.cz

.cz crawl dns

First seen 2026-05-11 · Last seen 2026-05-17 · ok HTTP/1.1 200 4853 ms crawled 2026-05-16

CZ · 78.128.246.93 · AS2852 CESNET z.s.p.o.

Reputation 100/100

sector tech type homepage

HTML metadata

Title: CESNET | zájmové sdružení právnických osob
Language: cs
Canonical: https://www.cesnet.cz/

Technology

Server: Apache

Analytics

Google Tag Manager

Third-party hosts loaded (2)

www.google.com×1
www.googletagmanager.com×1

Social

Contact

Phone

Registration

Registrar

REG-ACTIVE24

Created

1996-10-06

Expires

2026-10-28 161 days left

Updated

2025-11-12

Name servers

decsys.vsb.cz
nsa.ces.net
nsa.cesnet.cz
nsa.ten.cz

DNS records live

NS

decsys.vsb.cz
nsa.ces.net
nsa.cesnet.cz
nsa.ten.cz

MX

10 ag2.cesnet.cz
20 ag1.cesnet.cz

TXT

google-site-verification=_67tfbFvuyNG5y_dNEpIUG7l0cR2p3g0J1znRhtcVhE

Email authentication strong

SPF

v=spf1 exists:%{ir}.spf.cesnet.cz include:servers.mcsv.net ~all

softfail (~all)

DMARC

v=DMARC1; p=quarantine; sp=none; rua=mailto:dmarc-rua@cesnet.cz

policy: quarantine · sp=none

DKIM

k2: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAv2aC2KjGKLOwTweBY5A9RpjsxaBXR9r7OAU6U8/zn92ivImI75naUujWbItRI/QmL1jy5PWGqLwoUA…

selectors probed

Certificate (current)

GEANT TLS RSA 1

from 2026-02-20 to 2027-02-20

Expires in 277 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 75/100 Checked live page: https://www.cesnet.cz/

present

strict-transport-security
x-frame-options
x-content-type-options
referrer-policy

findings

missing Content Security Policy
missing Permissions Policy

Header values

referrer-policy: no-referrer-when-downgrade
x-frame-options: SAMEORIGIN
x-content-type-options: nosniff
strict-transport-security: max-age=31536000;includeSubDomains

Links to (8)

Linked from (2)

nette.org×1
synyo.com×1