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 bsd-security.ch

Valid
Issued by (CA)
Let's Encrypt
Subject
bsd-security.ch
Valid from
May 31, 2026
Valid until
Aug 29, 2026 (33 days remaining)
Public key
RSA 2048-bit
Serial
05C9308683336352D7063BE3956EB691C975
SHA-256 fingerprint
A9:7D:36:19:19:B5:01:C4:BB:FA:7D:EC:24:2C:96:DC:F7:C0:52:17:43:72:A3:68:6C:74:22:F4:60:D3:90:8E
Chain
YR1 → Root YR → ISRG Root X1
Subject Alternative Names (2)
*.bsd-security.ch, bsd-security.ch

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 Jul 26, 2026.

Never get surprised by bsd-security.ch's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch bsd-security.ch 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.