SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
optik-schaefer.com
SSL/TLS Certificate
SSL/TLS Certificate for optik-schaefer.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- optik-schaefer.com
- Valid from
- Aug 3, 2026
- Valid until
- Nov 1, 2026 (42 days remaining)
- Public key
- EC 256-bit
- Serial
- 05443E28A53E7BA710759D094DDBD11CA884
- SHA-256 fingerprint
- CB:14:FC:0C:27:D1:B2:A0:62:A8:0E:92:D3:6E:B0:3E:9C:CD:84:4D:DE:C5:E5:D7:02:F5:E6:3F:53:DF:4D:8F
- Chain
- YE2 → Root YE → ISRG Root X2 → ISRG Root X1
Certificate Authority Authorization (CAA)
The serving CA (Let's Encrypt) is authorized by this domain's CAA records (letsencrypt.org).
Never get surprised by optik-schaefer.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch optik-schaefer.com 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.
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