duul.cz

Observed Jul 29, 2026, 10:28 UTC (6h 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

Email bySparkPost

Secured byLet's Encrypt

Also usesGoogle Search Console

1 subdomain · domcop

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

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

duul.cz

A / AAAA

89.116.38.227

unattributedserves the site

ns.forpsi.czns.forpsi.itns.forpsi.net

forpsi.cz + forpsi.it + moreanswers its DNS

smtp.ujep.czpostak.ujep.cz

SparkPostreceives its email

TLS

duul.cz

Let's Encryptissued its certificate

DNS Records

A 1

89.116.38.227

MX 2

10smtp.ujep.cz
20postak.ujep.cz

TXT 2

v=spf1 a mx include:sparkpostmail.com ?all
google-site-verification=Iil8gVE3zolNn1m74w72vEwgdZtQEPsOMFyB_BRu5iE

NS 3

ns.forpsi.cz
ns.forpsi.it
ns.forpsi.net

SOA 1

ns.forpsi.net admin.forpsi.com

TLS Certificates (3)

Common Name	Issuer	Expires
`duul.cz`	C=US, O=Let's Encrypt, CN=YR1	Tue, 08 Sep 2026 18:44:46 +0000
`YR1`	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 (1)

www.duul.cz

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

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

Ed25519 Receipt

Receipt ID: rcpt_4eb491bc55d481a8
Output Hash: 0bf894806d70a6347d4ad676ae82ca7534dc723bf85c1f8b1d15d2ee845af5e2
Signature: ed25519:0cca9dbd1ec47b7af3e5340814f2ba9b2aea734e124c289e112e9d9631ea7a0a4b26252f8da2cf0a3112344398f4ca279ccc1468fe68dad7149ff083ab53c50a
Public Key: ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent: (genesis)
Plane: fast

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