cesnet.cz

Observed 2026-07-12T14:46:30.497Z (16h ago). Every field below was attested with an Ed25519 signature at scan time.

Up right now

Runs onCloudflare

Email byMailchimp

Also usesGoogle Search Console

IPv6 · 12 subdomains · tranco_40k

Every line above is a signed observation. Check the math at the bottom of the page.

INFRASTRUCTURE MAPwhat cesnet.cz actually stands on - every host below is a signed observation

cesnet.cz

A / AAAA

78.128.246.932001:718:ff05:108::93

Cloudflareserves the site

nsa.cesnet.czdecsys.vsb.cznsa.ten.cznsa.ces.net

cesnet.cz + vsb.cz + moreanswers its DNS

ag1.cesnet.czag2.cesnet.cz

Mailchimpreceives its email

HTTPS probe

redirect Redirecting (3xx) 301 → https://www.cesnet.cz/

HTTP status301

Servercloudflare

TLS protocolHTTP/2

TLS issuernot observed

Behind Cloudflareyes

Response time937 ms

DNS resolutionNOERROR

Redirect chain

https://www.cesnet.cz/

Every field above is part of the same signed observation as the records below. Blank means not observed, never "none".

DNS Records

A 1

78.128.246.93

AAAA 1

2001:718:ff05:108::93

MX 2

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

TXT 4

google-site-verification=_67tfbFvuyNG5y_dNEpIUG7l0cR2p3g0J1znRhtcVhE
v=spf1 exists:%{ir}.spf.cesnet.cz include:servers.mcsv.net ~all
v=DMARC1; p=quarantine; sp=none; rua=mailto:dmarc-rua@cesnet.cz
v=DNSSEC1; (detected)

NS 4

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

SOA 1

nsa.cesnet.cz hostmaster.cesnet.cz

CAA 6

issue harica.gr
issue letsencrypt.org
iodef mailto:abuse@cesnet.cz
issue postsignum.cz
issuemail harica.gr
issuewild harica.gr

TLS Certificates (0)

None.

Subdomains (12)

The proof

Signed at scan time. Check the math yourself. Every line above is part of one signed observation. Re-hash it and check the Ed25519 signature in your own browser; nothing leaves your machine.

Verify this receipt

Put the receipt on your own site. A live badge showing what DomainDrift observes and signs for cesnet.cz. It updates itself. It attests a signed observation - not that the site is safe.

<a href="https://domaindrift.io/t/cesnet.cz">
  <img src="https://domaindrift.io/badge/cesnet.cz.svg"
       width="300" height="64" alt="DomainDrift signed observations for cesnet.cz">
</a>

Ed25519 Receipt

Receipt ID: 7fc7a665-77ca-4e75-ad20-8f2c9a37b3aa
Output Hash: 4e24cccbc08cd78e970bfa0fe7b22424305ba471c410b342a0cfc7bb9fdb807c
Signature: ed25519:1a49dbba559ca8f3bc175c1044bda52e1d11b28ad3d916a959b49142af775c40b1f78b104c36eb090779b1d508029f1354b77e331a8be1fc666aeb92d0449c07
Public Key: ed25519:d610d74ef18f683e5beb859d241d5e67dff0c122e8928b06bec1c2476f4ba27b
Parent: (genesis)
Plane: fast

Verify this in your browser

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