jcofman.de
Observed Aug 16, 2026, 09:47 UTC (12m 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
Let's Encryptdomcop
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat jcofman.de actually stands on - every host below is a signed observation
jcofman.de
A / AAAA
76.76.21.12366.33.60.67
unattributedserves the site
NS
ns1.vercel-dns.comns2.vercel-dns.com
vercel-dns.comanswers its DNS
MX
mx1.improvmx.com
improvmx.comreceives its email
TLS
*.jcofman.de
Let's Encryptissued its certificate
DNS Records
A 2
76.76.21.12366.33.60.67
MX 1
10mx1.improvmx.com
NS 2
ns1.vercel-dns.comns2.vercel-dns.com
SOA 1
ns1.vercel-dns.com hostmaster.nsone.net
CAA 3
issue "letsencrypt.org"issue "pki.goog"issue "sectigo.com"
TLS Certificates (3)
| Common Name | Issuer | Expires |
|---|---|---|
*.jcofman.de |
C=US, O=Let's Encrypt, CN=YR2 | Wed, 23 Sep 2026 13:03:01 +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 (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; the only network request the check makes is for the published public keys.
Verify this receiptEd25519 Receipt
- Receipt ID
rcpt_a50b444b74c73522- Output Hash
792e48275a94917b23dffaeb56f1d02c779a9f7bd48f65d84f077263fadaef6d- Signature
ed25519:4d1ff2f6cbec55710f6d6d51ce2475c20baa44e0444571799052271cb1b11a4748aa7908737bbb97f4ba396952dc0ae541dd3da264129cbd5cece9ad4efd6604- Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9- Parent
(genesis)- Plane
- fast