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 h-s.cat
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- h-s.cat
- Valid from
- Oct 8, 2026
- Valid until
- Jan 6, 2027 (61 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 052BF33C0EBF34AF71C9FC2241EA846B4DB3
- SHA-256 fingerprint
- D5:00:21:05:53:EB:B0:44:87:A4:45:CD:6E:B7:DA:71:16:0C:CD:9F:CB:CC:83:E7:B4:EB:46:11:1C:24:CD:CA
- Chain
- YR2 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
We've observed 1 previous certificate for this host. This certificate has been served since Oct 10, 2026.
Never get surprised by h-s.cat's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch h-s.cat 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, CNAME, TXT 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.
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