ctdo.de

Observed Jul 22, 2026, 01:17 UTC (3h 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 · 1 subdomain · tranco_40k

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

INFRASTRUCTURE MAPwhat ctdo.de actually stands on - every host below is a signed observation

ctdo.de

A / AAAA

195.160.168.32001:67c:275c::ffff:c3a0:a803

2001serves the site

helium.ns.hetzner.dehydrogen.ns.hetzner.comoxygen.ns.hetzner.com

hetzner.de + hetzner.comanswers its DNS

mail.chaostreff-dortmund.de

chaostreff-dortmund.dereceives its email

TLS

ctdo.de

Let's Encryptissued its certificate

DNS Records

A 1

195.160.168.3

AAAA 1

2001:67c:275c::ffff:c3a0:a803

MX 1

10mail.chaostreff-dortmund.de

TXT 2

v=spf1 mx a -all
v=DMARC1; p=reject; rua=mailto:mailauth-reports@chaostreff-dortmund.de

NS 3

helium.ns.hetzner.de
hydrogen.ns.hetzner.com
oxygen.ns.hetzner.com

SOA 1

hydrogen.ns.hetzner.com dns.hetzner.com

TLS Certificates (3)

Common Name	Issuer	Expires
`ctdo.de`	C=US, O=Let's Encrypt, CN=YR2	Tue, 15 Sep 2026 16:58:08 +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 (1)

www.ctdo.de

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 ctdo.de. It updates itself. It attests a signed observation - not that the site is safe.

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

Ed25519 Receipt

Receipt ID: rcpt_01e6dd0e0b9370a9
Output Hash: 8e1ac1927ab28c1d8ab894788e63d1ef8cbae178d2005f911f697c4ef09aa416
Signature: ed25519:7b412b904abd251bb076e7076ad15864907d58a62276d16b98543284d6a597b020f6cf3d5091b3fea129ebea10b4520b8e15a6aa65f132fd246360ca8a7de005
Public Key: ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8
Parent: (genesis)
Plane: fast

Verify this in your browser

Permalink: https://domaindrift.io/t/ctdo.de