SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
st-uni.de
SSL/TLS Certificate
SSL/TLS Certificate for st-uni.de
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- st-uni.de
- Valid from
- Jul 7, 2026
- Valid until
- Oct 5, 2026 (50 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 053F01C827CAD65B692AB0F91C0BA1925ED0
- SHA-256 fingerprint
- 12:64:3E:0F:BD:6A:72:74:C1:E1:AD:8C:A1:9B:67:1E:BB:A6:69:7D:9C:09:B4:32:2D:51:42:40:53:D3:17:0D
- 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 Aug 15, 2026.
Never get surprised by st-uni.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch st-uni.de 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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