SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
osp-niedersachsen.de
SSL/TLS Certificate
SSL/TLS Certificate for osp-niedersachsen.de
Valid- Issued by (CA)
- Sectigo Limited
- Subject
- www.osp-niedersachsen.de
- Valid from
- Jun 16, 2026
- Valid until
- Dec 31, 2026 (55 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 8F1AE52B77F3EBC49A2C792405E1D914
- SHA-256 fingerprint
- 31:87:65:99:CA:F8:2A:FB:7B:95:17:59:20:1E:46:FF:05:9C:41:24:28:78:98:05:58:87:EA:4F:70:68:C6:96
- 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.
This certificate has been served since Oct 5, 2026.
Never get surprised by osp-niedersachsen.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch osp-niedersachsen.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, CNAME, TXT 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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.