zef.de
Observed Aug 2, 2026, 13:04 UTC (10h 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.
Up right now
Secured byLet's Encrypt
tranco
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat zef.de actually stands on - every host below is a signed observation
zef.de
A / AAAA
131.220.250.29
unattributedserves the site
NS
dns3.uni-bonn.dedns2.uni-bonn.dedns1.uni-bonn.de
uni-bonn.deanswers its DNS
TLS
zef.de
Let's Encryptissued its certificate
DNS Records
A 1
131.220.250.29
NS 3
dns3.uni-bonn.dedns2.uni-bonn.dedns1.uni-bonn.de
SOA 1
dns1.uni-bonn.de dnsadmin.uni-bonn.de
TLS Certificates (4)
| Common Name | Issuer | Expires |
|---|---|---|
zef.de |
C=US, O=Let's Encrypt, CN=YE1 | Fri, 30 Oct 2026 05:20:57 +0000 |
YE1 |
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 (0)
None observed.
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 receiptEd25519 Receipt
- Receipt ID
rcpt_4348673546ac3160- Output Hash
e64cd8ff966058bf930f83499f87080b7f38404029e73979cc234f2c61732783- Signature
ed25519:bf1c6d30e93a4dfa9ae1d3a1f83aee0dbcd5b056de261c4e592229427816ed787f8d779ae417fbc663c8a466f5770728c103db99c18d72ec85226ff969de7606- Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9- Parent
(genesis)- Plane
- fast