marcussundberg.com
Observed Aug 16, 2026, 14:45 UTC (5h 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
Email byGoogle Workspace
Google WorkspaceSecured byLet's Encrypt
Let's EncryptIPv6 · 2 subdomains · domcop
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat marcussundberg.com actually stands on - every host below is a signed observation
marcussundberg.com
A / AAAA
83.250.131.592600:70ff:b197::4
2600serves the site
NS
ns5.he.netns3.he.netns1.he.netns4.he.net+1 more
he.netanswers its DNS
MX
smtp.google.com
Google Workspacereceives its email
TLS
marcussundberg.com
Let's Encryptissued its certificate
DNS Records
A 1
83.250.131.59
AAAA 1
2600:70ff:b197::4
MX 1
1smtp.google.com
NS 5
ns5.he.netns3.he.netns1.he.netns4.he.netns2.he.net
SOA 1
ns1.he.net hostmaster.he.net
CAA 1
issue "letsencrypt.org"
TLS Certificates (4)
| Common Name | Issuer | Expires |
|---|---|---|
marcussundberg.com |
C=US, O=Let's Encrypt, CN=YE1 | Sun, 11 Oct 2026 20:33:04 +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 (2)
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_4b0d2ee0f66572aa- Output Hash
f6203900e444015636acfbfdf6b2ee8f78f33430fda130f706addc981cac3bda- Signature
ed25519:0f7de02e8c6f9927e36e68b5571bda5a21ff430fc3ca52df9986d358e9805ef6aab68c03266be488575fb808fcf1f68d30a97c20396a7f544c05a6f39a68c908- Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9- Parent
(genesis)- Plane
- fast