ustad.co
Observed Jul 26, 2026, 13:26 UTC (7d 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
Secured byLet's Encrypt
Also usesGoogle Search Console
domcop
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat ustad.co actually stands on - every host below is a signed observation
ustad.co
A / AAAA
31.43.161.631.43.160.6
unattributedserves the site
NS
apollo.ns.cloudflare.comcoraline.ns.cloudflare.com
cloudflare.comanswers its DNS
MX
aspmx.l.google.comaspmx2.googlemail.comaspmx3.googlemail.comalt1.aspmx.l.google.com+1 more
Google Workspacereceives its email
TLS
ustad.co
Let's Encryptissued its certificate
DNS Records
A 2
31.43.161.631.43.160.6
MX 5
1aspmx.l.google.com10aspmx2.googlemail.com10aspmx3.googlemail.com5alt1.aspmx.l.google.com5alt2.aspmx.l.google.com
TXT 2
google-site-verification=jbINjMGOMWvkENVJzLJN6ZdLlYECBPBZZ2eYz6R6HRcv=DMARC1;p=none
NS 2
apollo.ns.cloudflare.comcoraline.ns.cloudflare.com
SOA 1
apollo.ns.cloudflare.com dns.cloudflare.com
TLS Certificates (4)
| Common Name | Issuer | Expires |
|---|---|---|
ustad.co |
C=US, O=Let's Encrypt, CN=YE1 | Tue, 29 Sep 2026 14:02:03 +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_ed88beda6bc19d33- Output Hash
4a5b2360a4f2e1be715d34a5395dcecdc37418bd63f691e8ed01aae1710abda6- Signature
ed25519:696b25b7382e65a42a4f28ba77d01fafcd78bacd890f93c7eea643e7878cb22ea6b10b6b12cf3a9f4eb4f487ec3b6fbf3d3994502487a23c1518bc7c6f174f0d- Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9- Parent
(genesis)- Plane
- fast