zfmk.de
Observed Aug 2, 2026, 22:07 UTC (20m 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
IPv6 · 1 subdomain · majestic
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat zfmk.de actually stands on - every host below is a signed observation
zfmk.de
A / AAAA
194.164.58.1452a01:239:27a:3700::1
2a01serves the site
NS
dns1.uni-bonn.dedns3.uni-bonn.dedns2.uni-bonn.deunibn-dns.uni-koeln.de
uni-bonn.de + uni-koeln.deanswers its DNS
MX
esa1.rhrz.uni-bonn.deesa3.rhrz.uni-bonn.deesa2.rhrz.uni-bonn.de
uni-bonn.dereceives its email
TLS
leibniz-lib.de
Let's Encryptissued its certificate
DNS Records
A 1
194.164.58.145
AAAA 1
2a01:239:27a:3700::1
MX 3
10esa1.rhrz.uni-bonn.de10esa3.rhrz.uni-bonn.de10esa2.rhrz.uni-bonn.de
NS 4
dns1.uni-bonn.dedns3.uni-bonn.dedns2.uni-bonn.deunibn-dns.uni-koeln.de
SOA 1
dns1.uni-bonn.de dnsadmin.uni-bonn.de
TLS Certificates (3)
| Common Name | Issuer | Expires |
|---|---|---|
leibniz-lib.de |
C=US, O=Let's Encrypt, CN=YR1 | Sun, 11 Oct 2026 21:33:11 +0000 |
YR1 |
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)
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_324f20858ced3694- Output Hash
c7e49b62c2c9ef61eb00f1b3373dbd7bccd62e6eed67aff4d3fc0f90046d731d- Signature
ed25519:b17539c71ae7223f9f92fafdd69db0c4b94eb50f731a9a0f1fb3543179e4ae6821088b9dff1652fe8585d1eed761b48ef01dd5c552188ff7c50e4464603fc905- Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9- Parent
(genesis)- Plane
- fast