SSL/TLS Certificate Lookup

Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted

SSL/TLS Certificate for ctrholding.sk

Valid
Issued by (CA)
Let's Encrypt
Subject
ctrholding.sk
Valid from
Sep 5, 2026
Valid until
Dec 4, 2026 (80 days remaining)
Public key
EC 256-bit
Serial
06685E4976C80AEADDD8BF03A2F209E1B3B8
SHA-256 fingerprint
F2:9D:59:AF:1C:93:75:C1:3D:B7:3F:07:2F:BA:CB:94:9F:19:67:A5:2F:2A:C1:5F:A1:32:7A:0A:45:D5:30:1A
Chain
YE2 → Root YE → ISRG Root X2 → ISRG Root X1
Subject Alternative Names (2)
*.ctrholding.sk, ctrholding.sk

Certificate Authority Authorization (CAA)

No CAA policy is published for this domain — any certificate authority may issue for it.

This certificate has been served since Sep 4, 2026.

Never get surprised by ctrholding.sk's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch ctrholding.sk continuously, notifying you the moment anything moves across all three signals:

Uptime

We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.

DNS changes

We watch NS, MX, CAA, DNSSEC, CNAME and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.

TLS certificate

We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.

Monitor this certificate free

Free for your first domain: uptime, DNS, and certificate together. No credit card.