zcu.cz

Observed 2026-07-10T11:12:53.981Z (1d ago). Every field below was attested with an Ed25519 signature at scan time.

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

zcu.cz

A / AAAA

147.228.6.2242001:718:1801:1058::1:102

2001serves the site

nsa.ces.neterebos.zcu.czhera.zcu.cz

ces.net + zcu.czanswers its DNS

fred.zcu.cz

zcu.czreceives its email

HTTPS probe

redirect Redirecting (3xx) 301 → https://www.zcu.cz/

HTTP status301

Servercloudflare

TLS protocolHTTP/2

TLS issuernot observed

Behind Cloudflareyes

Response time1204 ms

DNS resolutionNOERROR

Redirect chain

https://www.zcu.cz/

Every field above is part of the same signed observation as the records below. Blank means not observed, never "none".

DNS Records

A 1

147.228.6.224

AAAA 1

2001:718:1801:1058::1:102

MX 1

10fred.zcu.cz

TXT 4

v=spf1 mx ip4:147.228.0.0/16 ip6:2001:718:1801::/48 -all
MS=ms26894334
v=DMARC1; p=none; rua=mailto:dmarc-rua@zcu.cz
v=DNSSEC1; (detected)

NS 3

nsa.ces.net
erebos.zcu.cz
hera.zcu.cz

SOA 1

hera.zcu.cz hostmaster.zcu.cz

TLS Certificates (0)

None.

Subdomains (169)

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

Ed25519 Receipt

Receipt ID: 735b3d8c-fcfa-45d3-bb32-d690544c891d
Output Hash: fd90a402003281157bd2db9af6380dbfdca84064f2841712bb37eefae1b45857
Signature: ed25519:7fdb04e385323da2f05b48e7ef27ff2be8663657516d5be8177f278aa0a9b099f8879b58a1b99bca51b38a9f118dc4023410702ae6b06ac356a6f7659fe3fa0c
Public Key: ed25519:d610d74ef18f683e5beb859d241d5e67dff0c122e8928b06bec1c2476f4ba27b
Parent: (genesis)
Plane: fast

Verify this in your browser

Permalink: https://connor.dns.drm3.network/t/zcu.cz/2026-07-10T11:12:53.981Z