SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
zoo-widmer.com
SSL/TLS Certificate
SSL/TLS Certificate for zoo-widmer.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- zoo-widmer.ch
- Valid from
- Sep 25, 2026
- Valid until
- Dec 24, 2026 (78 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 061A7249B03F0A117B55F48620DEBFFC84F7
- SHA-256 fingerprint
- 4A:0C:F2:14:E5:E4:A5:13:AB:34:4F:D9:4C:59:9A:F2:F0:2D:13:0A:4F:7F:E5:EA:30:89:A9:F9:95:CF:50:74
- Chain
- YR1 → Root YR → 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 17, 2026.
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Uptime
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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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