SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
gruemer-technik.de
SSL/TLS Certificate
SSL/TLS Certificate for gruemer-technik.de
Self-signed- Issued by (CA)
- sni-support-required-for-valid-ssl
- Subject
- sni-support-required-for-valid-ssl
- Valid from
- Jan 24, 2025
- Valid until
- Jan 22, 2035 (3001 days remaining)
- Public key
- RSA 4096-bit
- Serial
- 7D8C65C19849CB5A75FC3524CE2FD92B0A6E34B8
- SHA-256 fingerprint
- 81:C6:60:A8:6E:4D:45:55:D8:BE:C9:5F:C6:56:B6:EB:8D:93:C2:46:71:03:9C:1B:71:AD:87:49:DE:9C:66:D9
- Chain
- sni-support-required-for-valid-ssl
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 6, 2026.
Never get surprised by gruemer-technik.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch gruemer-technik.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.