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 markus-shiatsu.at

Valid
Issued by (CA)
Let's Encrypt
Subject
markus-shiatsu.at
Valid from
Sep 21, 2026
Valid until
Dec 20, 2026 (38 days remaining)
Public key
EC 256-bit
Serial
053C1D9C4CA808F35A8CC8A8E979A8039D37
SHA-256 fingerprint
ED:40:0F:B8:B4:78:F0:E8:62:0F:77:E2:11:4A:51:F7:3E:AE:FF:86:E2:A0:61:C2:AB:3E:BD:C9:81:4A:11:60
Chain
YE1 → Root YE → ISRG Root X2 → ISRG Root X1
Subject Alternative Names (1)
markus-shiatsu.at

Certificate Authority Authorization (CAA)

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

Never get surprised by markus-shiatsu.at's certificate expiring

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

Certificate monitor showing the issuer, expiry date, chain status, fingerprint, covered names, and a history of a rotation and an expiry warning

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.

Monitor this certificate free

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