SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
sesc-it.de
SSL/TLS Certificate
SSL/TLS Certificate for sesc-it.de
Hostname mismatch- Issued by (CA)
- Let's Encrypt
- Subject
- admin.sesc-it.de
- Valid from
- Sep 15, 2026
- Valid until
- Dec 14, 2026 (76 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 0676C74D6F9610B2E2484C0B46B63450F0C2
- SHA-256 fingerprint
- 0B:D7:D9:7A:B6:1E:0F:6D:FA:43:01:D3:86:9B:A3:27:53:B5:BD:07:F6:1C:D7:47:5D:F8:30:6A:55:B2:89:C6
- Chain
- YR2 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
We've observed 1 previous certificate for this host. This certificate has been served since Sep 27, 2026.
Never get surprised by sesc-it.de's certificate expiring
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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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