SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
snn-unit.de
SSL/TLS Certificate
SSL/TLS Certificate for snn-unit.de
Valid- Issued by (CA)
- Sectigo Limited
- Subject
- *.snn-unit.de
- Valid from
- Nov 9, 2025
- Valid until
- Nov 23, 2026 (99 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 67536C2D3DA58B4FCC421C97ABD4D079
- SHA-256 fingerprint
- A1:26:C6:E2:A0:EC:95:51:E1:4A:42:02:A3:1B:E0:75:C3:D9:3D:46:5A:7E:52:37:55:48:32:F7:ED:1E:5E:58
- Chain
- Sectigo Public Server Authentication CA DV R36 → Sectigo Public Server Authentication Root R46 → USERTrust RSA Certification Authority
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
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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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