o2.cz

Observed 2026-07-12T05:46:55.670Z (22h ago). Every field below was attested with an Ed25519 signature at scan time.

Up right now

Runs onCloudflare

Also usesGoogle Search ConsoleMiro

DNSSEC on · IPv6 · tranco_40k

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

INFRASTRUCTURE MAPwhat o2.cz actually stands on - every host below is a signed observation

o2.cz

A / AAAA

160.218.161.1622001:41d8:1:742:2::2

Cloudflareserves the site

dns.iol.czns2.tel.cz

iol.cz + tel.czanswers its DNS

smtp-in.o2.cz

o2.czreceives its email

HTTPS probe

redirect Redirecting (3xx) 302 → https://www.o2.cz

HTTP status302

Servercloudflare

TLS protocolHTTP/2

TLS issuernot observed

Behind Cloudflareyes

Response time1038 ms

DNS resolutionNOERROR

Redirect chain

https://www.o2.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

160.218.161.162

AAAA 1

2001:41d8:1:742:2::2

MX 1

10smtp-in.o2.cz

TXT 16

MS=ms52641182
MS=7B9F81FDD83DA2FFCACC2C8F3F61B941A25EDBB4
7m05t8bvlcch53s7ys5nrxwxsnrgmphd
browserstack-domain-verification=959efc5e-d239-4b29-972b-846a3587e939
PZ3jepCkOh+eOvAvsDTRPHvNHoyzbJLH9ySyuAZFFY4maiTfijGZg4E7xmBQb1R9RmOW+qUkHfl/raEpx37rrA==
ppe-87ef0e4514ad3c042110125606a3c6311b5dc64b
intersight=56f3c8232259f96eaa965d84ea4b75dfa15ed49b46edcdbe50c16dff242f86b8
google-site-verification=0TIBeL91z3rZRIMY0CZSLblUAbTxh0Kr8BPG3LFtA_8
v=spf1 include:out.o2.cz a:aa.iol.cz ip4:90.176.151.28 include:spf.mailforce.cz include:spfe.targito.com include:o2.secar.cz ip4:74.121.51.138 include:spf.smartemailing.cz include:spf.finforce.cz -all
miro-verification=814cf298c288c6fcf51f6243354f4ff27b13a3d0

NS 2

dns.iol.cz
ns2.tel.cz

SOA 1

dns.iol.cz hostmaster.iol.cz

TLS Certificates (0)

None.

Subdomains (14)

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 o2.cz. It updates itself. It attests a signed observation - not that the site is safe.

<a href="https://domaindrift.io/t/o2.cz">
  <img src="https://domaindrift.io/badge/o2.cz.svg"
       width="300" height="64" alt="DomainDrift signed observations for o2.cz">
</a>

Ed25519 Receipt

Receipt ID: c1b06313-a4e4-4120-8c05-24da3bbc3eca
Output Hash: 18666dffcc9445246b5d53b6033b15624aa6946ee61bc423ef935e13847a68d0
Signature: ed25519:b3f7f6ed51c7bfbcf6fdcec828fde25c5ce76a04c3160dea7cebd495969ce7d14f6aaee130f1eaa730b8137f029b04d650b866d85ed19e54510104cfd2c6590c
Public Key: ed25519:d610d74ef18f683e5beb859d241d5e67dff0c122e8928b06bec1c2476f4ba27b
Parent: (genesis)
Plane: fast

Verify this in your browser

Permalink: https://domaindrift.io/t/o2.cz