SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
bauoptimierung.com
SSL/TLS Certificate
SSL/TLS Certificate for bauoptimierung.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- bauoptimierung.com
- Valid from
- Aug 23, 2026
- Valid until
- Nov 21, 2026 (78 days remaining)
- Public key
- EC 256-bit
- Serial
- 0651FC88E195004CCDC4E6AC51A5D9898793
- SHA-256 fingerprint
- F6:7A:E6:6A:86:16:D3:E2:6A:11:6D:D6:72:12:0C:D7:AF:26:68:54:36:8D:0B:2B:60:D2:92:D8:41:59:9E:3E
- Chain
- YE1 → Root YE → ISRG Root X2 → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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This is today's certificate. Turn on monitoring and we'll watch bauoptimierung.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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