master.cz

Observed 2026-07-14T13:12:58.061Z (20h ago). Every field below was attested with an Ed25519 signature at scan time.

Up right now

Runs onCloudflare

Also usesGoogle Search Console

DNSSEC on · IPv6 · 13 subdomains · tranco_40k

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

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

master.cz

A / AAAA

80.79.16.2352a01:430:100:2b::5

Cloudflareserves the site

ns1.master.czns2.master.czns3.master.cz

master.czanswers its DNS

mail.master.czns3.master.cz

master.czreceives its email

HTTPS probe

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

HTTP status301

Servercloudflare

TLS protocolHTTP/2

TLS issuernot observed

Behind Cloudflareyes

Response time1135 ms

DNS resolutionNOERROR

Redirect chain

https://www.master.cz/

MCP This domain advertises an AI service endpoint at _mcp._tcp.

272e638e51f8544cf26ea584d68328a7f37365f2fdaac8e64509e0985135049

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

DNS Records

A 1

80.79.16.235

AAAA 1

2a01:430:100:2b::5

MX 2

10mail.master.cz
25ns3.master.cz

TXT 9

272e638e51f8544cf26ea584d68328a7f37365f2fdaac8e64509e0985135049
v=spf1 mx ip6:2a01:430:100:5c::2 a:d24.westmaster.com ip4:185.58.41.176 ip4:77.93.193.48 a:cis.masterdc.com a:d4023.masterinter.net a:cloud-2123.masterinter.net ip4:81.31.45.148 ip4:185.58.42.235 ip4:89.185.237.62 include:spf.protection.outlook.com a:mailing.master.cz ~all
brevo-code:f376c48802e5709dff3593087c019f90
MS=07A1C78FD7087B45AA9D90A4F11B567B29AC9E9D
google-site-verification=uWFno1EFZ2n7A5IXU2WuIdPFXjf8_gljzFe1RRnIDKY
ahrefs-site-verification_883274841276f4db6957d3bf1dff5ccbf7aa74c716af02625ba5158800538037
v=DMARC1; p=reject; rua=mailto:dmarc-reports@master.cz
v=STSv1; id=169053306248Z;
v=DNSSEC1; (detected)

NS 3

ns1.master.cz
ns2.master.cz
ns3.master.cz

SOA 1

ns1.master.cz noc.master.cz

CAA 4

iodef mailto:support@master.cz
issue digicert.com
issue certum.pl
issue letsencrypt.org

TLS Certificates (0)

None.

Subdomains (12)

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

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

Ed25519 Receipt

Receipt ID: a4c68e9e-9f6f-49e6-86f9-41f517408799
Output Hash: b102b9afc719bfb7d281ce220013ddb714da31f00a2d7c464a3d43e535f427f2
Signature: ed25519:199c4a0f6de307939883958efb26f6ba0142fb836fe0471693b5a71b7faa1bc2a87342de3b9b4f3593c216953039bd4f6b83a833e3d363dfe7c6bd75dbfb3306
Public Key: ed25519:d610d74ef18f683e5beb859d241d5e67dff0c122e8928b06bec1c2476f4ba27b
Parent: (genesis)
Plane: fast

Verify this in your browser

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