dzs.cz

Observed Jul 25, 2026, 09:24 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

Email byMicrosoft 365

Secured byLet's Encrypt

Also usesGoogle Search Console

IPv6 · 1 subdomain · tranco

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

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

dzs.cz

A / AAAA

81.95.108.752a00:4b40:1000:126:81:95:108:75

2a00serves the site

alfa.ns.active24.czbeta.ns.active24.czgama.ns.active24.sk

active24.cz + active24.skanswers its DNS

dzs-cz.mail.protection.outlook.com

Microsoft 365receives its email

TLS

dzs.cz

Let's Encryptissued its certificate

DNS Records

A 1

81.95.108.75

AAAA 1

2a00:4b40:1000:126:81:95:108:75

MX 1

0dzs-cz.mail.protection.outlook.com

TXT 7

MS=ms18545134
openai-domain-verification=dv-pj77tJ6jUgGyiZZBmMEukE1P
google-site-verification=CW9kyATAczCw0zVfIcSf1_9ncQOO37HVZDkdJCBUtKk
google-site-verification=NeKY1SbcB9GV0VarfKbQ9BbIobin6UD92Xc3cP_fIMs
WMn2godyYRPl4tV9OoVN0BT5YKrTVPrYkI30ktfpMboa+gh2ccg2l8z2219vE7mwfCs4+OmluckD/KNPbjEysA==
v=spf1 a mx ip4:81.30.227.242 ip4:31.15.10.23 ip4:81.30.227.251 ip4:91.214.193.163 ip4:81.30.227.248 ip4:91.214.192.14 ip6:2a01:430:31::163 a:hybrid.dzs.cz a:odesilani.cz a:portal.studyin.cz a:uvirt60.active24.cz include:spf.protection.outlook.com -all
v=DMARC1; p=none

NS 3

alfa.ns.active24.cz
beta.ns.active24.cz
gama.ns.active24.sk

SOA 1

alfa.ns.active24.cz hostmaster.active24.cz

TLS Certificates (4)

Common Name	Issuer	Expires
`dzs.cz`	C=US, O=Let's Encrypt, CN=YE1	Mon, 19 Oct 2026 08:52:04 +0000
`YE1`	C=US, O=ISRG, CN=Root YE	Sat, 02 Sep 2028 23:59:59 +0000
`Root YE`	C=US, O=Internet Security Research Group, CN=ISRG Root X2	Thu, 02 Sep 2032 23:59:59 +0000
`ISRG Root X2`	C=US, O=Internet Security Research Group, CN=ISRG Root X1	Thu, 02 Sep 2032 23:59:59 +0000

Subdomains (1)

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

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

Ed25519 Receipt

Receipt ID: rcpt_5c5c4a137457c640
Output Hash: de4ef7971d6445a3a809650dd63915c8613f28c1794d53eb3a8a589d4d9e075d
Signature: ed25519:072b16b43d7ebbde8ba3169f6a05dba9afe2535bed243be8f09e00f60f8e02ddf6ebf1700323160acb02f1cfd98925c97e1f30d3004078922006e95d8e208a07
Public Key: ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent: (genesis)
Plane: fast

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