doltak.cz
Observed Jul 25, 2026, 18:47 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
Runs onCloudflare
Email byMicrosoft 365
Secured byLet's Encrypt
Also usesFacebook/Meta
IPv6 · tranco
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat doltak.cz actually stands on - every host below is a signed observation
doltak.cz
A / AAAA
172.67.166.204104.21.49.1972606:4700:3032::ac43:a6cc2606:4700:3031::6815:31c5
Cloudflareserves the site
NS
grannbo.ns.cloudflare.comjarred.ns.cloudflare.com
cloudflare.comanswers its DNS
MX
doltak-cz.mail.protection.outlook.com
Microsoft 365receives its email
TLS
doltak.cz
Let's Encryptissued its certificate
DNS Records
A 2
172.67.166.204104.21.49.197
AAAA 2
2606:4700:3032::ac43:a6cc2606:4700:3031::6815:31c5
MX 1
1doltak-cz.mail.protection.outlook.com
TXT 3
facebook-domain-verification=3penrfk5471ay20u9jddexa4v051bcv=spf1 a mx ip4:86.110.232.32/27 include:spf.protection.outlook.com ~allv=DMARC1; p=none; rua=mailto:7lkhqk4qd0@dmarc-reports.ecomailapp.com; fo=1; ri=86400;
NS 2
grannbo.ns.cloudflare.comjarred.ns.cloudflare.com
SOA 1
grannbo.ns.cloudflare.com dns.cloudflare.com
TLS Certificates (4)
| Common Name | Issuer | Expires |
|---|---|---|
doltak.cz |
C=US, O=Let's Encrypt, CN=YE1 | Fri, 25 Sep 2026 17:22:47 +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_23841cb4e976b8d8- Output Hash
df3d3af653ae87960642eddeddc264aa8bdc25ba38dd911187ef76f2335b99f1- Signature
ed25519:43fe046915d08be2e8604594ef4e6dbd1253396fee042c1e430f2c654f24a51dfcc252b039fd7df576c2c206b59f51c79cbf1fc3574af8dc825925dce2ddef0f- Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9- Parent
(genesis)- Plane
- fast