valka.cz
Observed Aug 2, 2026, 14:14 UTC (18h 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 bySendGrid
Secured byLet's Encrypt
Also usesGoogle Search Console
IPv6 · 1 subdomain · tranco
Every line above is a signed observation. Check the math at the bottom of the page.
INFRASTRUCTURE MAPwhat valka.cz actually stands on - every host below is a signed observation
valka.cz
A / AAAA
89.185.242.192a01:430:234::2
2a01serves the site
NS
ns1.ignum.comns2.ignum.cz
ignum.com + ignum.czanswers its DNS
MX
www.valka.cz
SendGridreceives its email
TLS
www.valka.cz
Let's Encryptissued its certificate
DNS Records
A 1
89.185.242.19
AAAA 1
2a01:430:234::2
MX 1
10www.valka.cz
TXT 2
v=spf1 mx a include:u1856748.wl.sendgrid.net -allgoogle-site-verification=dmSZ_IFT6scL3j2trSEzpgpAtNUOKNUsvqfbgsehk70
NS 2
ns1.ignum.comns2.ignum.cz
SOA 1
ns1.ignum.com hostmaster.ignum.cz
DMARC_RECORDS 1
v=DMARC1;p=quarantine;sp=quarantine;adkim=r;aspf=r
TLS Certificates (3)
| Common Name | Issuer | Expires |
|---|---|---|
www.valka.cz |
C=US, O=Let's Encrypt, CN=YR2 | Sat, 17 Oct 2026 06:45:09 +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 (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_fba72ff2f33de0c0- Output Hash
da09bea3e12a2108800b9e95eb41f49eac71cc43b2419eda919cb14f7c94e2de- Signature
ed25519:af7d0bf0dafff1b7b550969b9233d65a67acd7f7ee6dfccf19afb9fad4e376b851925d267bf8121c4e5eb705879f44cd6acf5af1769ece5866fe5b868261610b- Public Key
ed25519:4859bb613d650e12dd7478cc307c73a8712fabc115a9dc59f65534ed3c09a8f9- Parent
(genesis)- Plane
- fast