du.cz

Observed Jul 25, 2026, 21:40 UTC (6d ago). Every field below was attested with an Ed25519 signature at scan time. Catalog observation, re-checked on rotation - watch it for 5-minute checks.

Verify this receipt yourself + Watch this domain

Up right now

Secured byLet's Encrypt

tranco

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

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

du.cz

A / AAAA

92.62.124.161

unattributedserves the site

bill2.dashofer.czmail.dashofer.com

dashofer.cz + dashofer.comanswers its DNS

mail.dashofer.commx.dashofer.cz

dashofer.com + dashofer.czreceives its email

TLS

du.cz

Let's Encryptissued its certificate

DNS Records

A 1

92.62.124.161

MX 2

20mail.dashofer.com
5mx.dashofer.cz

TXT 2

v=spf1 include:dashofer.cz ~all
v=DMARC1; p=none

NS 2

bill2.dashofer.cz
mail.dashofer.com

SOA 1

bill2.dashofer.cz root.bill2.dashofer.cz

TLS Certificates (3)

Common Name	Issuer	Expires
`du.cz`	C=US, O=Let's Encrypt, CN=YR2	Fri, 23 Oct 2026 08:07:13 +0000
`YR2`	C=US, O=ISRG, CN=Root YR	Sat, 02 Sep 2028 23:59:59 +0000
`Root YR`	C=US, O=Internet Security Research Group, CN=ISRG Root X1	Thu, 02 Sep 2032 23:59:59 +0000

Subdomains (0)

None observed.

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 du.cz. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: rcpt_d521a48f2fecdfe7
Output Hash: 908e758804896225ac7bfd28f99c8fd32d67f64b33ab5b1260076af5e0b75b8a
Signature: ed25519:4105a5f5df27a518b586a2372e3bd56143956495227db3be27cc8aa1db4c619941e930e1fdec9ddc133072a5382b4e5d8be07f2f16c8b636a0d54f6303f7e006
Public Key: ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent: (genesis)
Plane: fast

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Permalink: https://domaindrift.io/t/du.cz