cdu.de

Observed Jul 17, 2026, 15:16 UTC (2d ago). Every field below was attested with an Ed25519 signature at scan time.

Up right now

Email byBrevo (Sendinblue)

Secured byLet's Encrypt

Also usesGoogle Search Console

1 subdomain · tranco_100k

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

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

cdu.de

A / AAAA

193.219.105.10

unattributedserves the site

ns1.arcor-ip.dens2.arcor-ip.dens3.arcor-ip.dens1.cdu.de

arcor-ip.de + cdu.deanswers its DNS

mail48.cdu.de

Brevo (Sendinblue)receives its email

TLS

cdu.de

Let's Encryptissued its certificate

DNS Records

A 1

193.219.105.10

MX 1

5mail48.cdu.de

TXT 12

MS=ms73549048
google-site-verification=uPtRpymmuYjbZQ1Lmr2a1gAdJuAGrEHOKCgG22YJNYA
apple-domain-verification=3SPyxSh5Gir4W3lC
MS=ms80140043
google-site-verification=5VKRrUmBgFVF-szaRCFv4S0c4pajeEcqTBqvVSkNjlk
google-site-verification=GyUpyOQVmh5n3HahHS97DHNVkwwfaagmy9WKenpTEg8
Sendinblue-code:aa2789879467a12bc6861a37ecf4889f
google-site-verification=HxwmL2DD8zzNOeUQ4xOvXuYGwDJ6xM0Ws9eckrztXVw
NEcqxLZkjZv1JyFpDjTNF/wvWupIQoimBc6Gc+5SbtwxiXS/DOATFriP+92cb9SB4t9ZwSRS7aaXbPLqZzFnlg==
cisco-ci-domain-verification=10a6638c06922ff7bf5c73c9899e3e6517bce78ae01ebb8f7892f319ab8c07d6

NS 4

ns1.arcor-ip.de
ns2.arcor-ip.de
ns3.arcor-ip.de
ns1.cdu.de

SOA 1

ns1.cdu.de root.ns1.cdu.de

TLS Certificates (4)

Common Name	Issuer	Expires
`cdu.de`	C=US, O=Let's Encrypt, CN=YE2	Wed, 07 Oct 2026 19:25:29 +0000
`YE2`	C=US, O=ISRG, CN=Root YE	Sat, 02 Sep 2028 23:59:59 +0000
`Root YE`	C=US, O=Internet Security Research Group, CN=ISRG Root X2	Thu, 02 Sep 2032 23:59:59 +0000
`ISRG Root X2`	C=US, O=Internet Security Research Group, CN=ISRG Root X1	Thu, 02 Sep 2032 23:59:59 +0000

Subdomains (1)

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

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

Ed25519 Receipt

Receipt ID: f8e215f0-470b-4c3d-9533-595bf1a56656
Output Hash: 19359c350d94fdf23ce05a91d26530aa1d49a8dc7674aeaf88d5abfbbc007228
Signature: ed25519:c4ee00409793cf9adb47612086c0e12871f610a5566aa46650f12f3498aae948f684736b4a5df0c358655df3f3ab6fd956ea5e420f5826b07afc44f8e284e70c
Public Key: ed25519:178c3bd0f57d9d64b83cc4630753381e1a465005a2bbba3d032371f24af0bfd8
Parent: (genesis)
Plane: fast

Verify this in your browser

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