SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
rok-hannover.de
SSL/TLS Certificate
SSL/TLS Certificate for rok-hannover.de
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- *.rok-hannover.de
- Valid from
- Oct 1, 2026
- Valid until
- Dec 30, 2026 (50 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0580E915FB4585BC8F864D54E82B7542D2E4
- SHA-256 fingerprint
- 67:BD:3C:D5:C8:06:53:5E:8E:76:A9:DA:B0:AC:2B:2C:23:BF:03:B6:E1:EE:5D:E8:5B:41:B0:09:9C:D4:06:B6
- 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.
This certificate has been served since Nov 6, 2026.
Never get surprised by rok-hannover.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch rok-hannover.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.