SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
tobias-wassermann.ch
SSL/TLS Certificate
SSL/TLS Certificate for tobias-wassermann.ch
Expired- Issued by (CA)
- Let's Encrypt
- Subject
- autoconfig.tobias-wassermann.ch
- Valid from
- Jun 23, 2024
- Valid until
- Sep 21, 2024 (expired 781 days ago)
- Public key
- EC 256-bit
- Serial
- 034224852DEC119C50BF58152EFA9132A19A
- SHA-256 fingerprint
- 28:4A:FB:C4:24:5C:3A:57:30:97:0F:CD:64:6D:88:4A:1A:9D:6E:85:7E:3C:DC:3C:15:DE:02:F5:77:71:0F:D4
- Chain
- E5 → ISRG Root X1
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 23, 2026.
Never get surprised by tobias-wassermann.ch's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch tobias-wassermann.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, 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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.