upv.cz

Observed Jul 25, 2026, 09:09 UTC (8d 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

IPv6 · 3 subdomains · tranco

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

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

upv.cz

A / AAAA

90.183.237.132a00:1028:800:5000::d

2a00serves the site

ns1.upv.czns2.upv.czns3.upv.cz

upv.czanswers its DNS

smtp.upv.czmx2.upv.cz

upv.czreceives its email

TLS

upv.cz

Let's Encryptissued its certificate

DNS Records

A 1

90.183.237.13

AAAA 1

2a00:1028:800:5000::d

MX 2

10smtp.upv.cz
20mx2.upv.cz

TXT 2

v=spf1 mx a:smtp.upv.cz a:postak.upv.cz a:mx2.upv.cz ~all
v=DMARC1; p=reject; sp=reject; adkim=r; aspf=r; fo=1; rua=mailto:dmarc.reports@upv.cz,mailto:819703ec35@rua.easydmarc.eu; ruf=mailto:dmarc.reports@upv.cz,mailto:819703ec35@ruf.easydmarc.eu; pct=100; ri=86400

NS 3

ns1.upv.cz
ns2.upv.cz
ns3.upv.cz

SOA 1

ns1.upv.cz hostmaster.upv.cz

CAA 4

iodef "mailto:it.dns.caa@upv.gov.cz"
issue "certum.pl"
issue "ica.cz"
issue "letsencrypt.org"

TLS Certificates (3)

Common Name	Issuer	Expires
`upv.cz`	C=US, O=Let's Encrypt, CN=YR2	Wed, 02 Sep 2026 03:26:02 +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 (3)

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

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

Ed25519 Receipt

Receipt ID: rcpt_203602e5e008a96b
Output Hash: 489bdb68d7b933eef63ae3925740ec3e4db5193958ea02a4ed5d682fc5052612
Signature: ed25519:8d5638885d46e2abb3b8f859e6bd3be6e03262bae106d77ec5e7b13eb5dff0f90379e90086e78f4e5097ec5fe9fb692e7a59d33c63c6346ea0b3b2614410f60c
Public Key: ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent: (genesis)
Plane: fast

Verify this in your browser

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