e-infra.cz

Observed Jul 29, 2026, 04:28 UTC (7h 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

Also usesGoogle Search Console

2 subdomains · tranco

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

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

e-infra.cz

A / AAAA

93.185.108.156

unattributedserves the site

nsa.ces.netnsa.cesnet.cz

ces.net + cesnet.czanswers its DNS

ag1.cesnet.czag2.cesnet.cz

cesnet.czreceives its email

TLS

e-infra.cz

Let's Encryptissued its certificate

DNS Records

A 1

93.185.108.156

MX 2

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

TXT 3

v=spf1 include:cesnet.cz ip4:93.185.100.121 ip4:147.251.4.46 ?all
google-site-verification=7BOQyS-gEywMoh5YsEvBsIfRM3MCFmvqaWBYiRhacLM
v=DMARC1; p=none; rua=mailto:dmarc-rua@cesnet.cz

NS 2

nsa.ces.net
nsa.cesnet.cz

SOA 1

nsa.cesnet.cz hostmaster.cesnet.cz

CAA 4

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

TLS Certificates (3)

Common Name	Issuer	Expires
`e-infra.cz`	C=US, O=Let's Encrypt, CN=YR2	Tue, 20 Oct 2026 10:46:13 +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 (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 e-infra.cz. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: rcpt_4e4f8a56ade8a428
Output Hash: 2ed78e8abfe8ee4e74d6ab629e9c5c5f9ce17a4aae0abba15418f0ec72a05ad9
Signature: ed25519:763a4d312cb6d6d885e779cb8a794f541b4060b9c9978f7169f43563497e7e0061fb9bda6aa568099ca4c99eb504782f9397853bf38d16a8e5aab9d3511b120d
Public Key: ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9
Parent: (genesis)
Plane: fast

Verify this in your browser

Permalink: https://domaindrift.io/t/e-infra.cz