SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
jona-app.de
SSL/TLS Certificate
SSL/TLS Certificate for jona-app.de
Valid- Issued by (CA)
- Sectigo Limited
- Subject
- *.jona-app.de
- Valid from
- Feb 20, 2026
- Valid until
- Mar 6, 2027 (224 days remaining)
- Public key
- RSA 2048-bit
- Serial
- C1DAD2E9AABDC21F5B81F840790D892D
- SHA-256 fingerprint
- DD:C7:91:EA:2A:5F:6A:35:FA:19:D4:A5:2B:9C:E4:22:58:08:72:2B:6E:D6:D7:BA:6D:02:9B:A5:0D:7E:70:D4
- 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.
Never get surprised by jona-app.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch jona-app.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, 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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.