SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
runa-masi.de
SSL/TLS Certificate
SSL/TLS Certificate for runa-masi.de
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- runa-masi.de
- Valid from
- Oct 11, 2026
- Valid until
- Jan 9, 2027 (83 days remaining)
- Public key
- EC 256-bit
- Serial
- 052860C18DA20426D210313ACE01B729E718
- SHA-256 fingerprint
- A4:FF:52:4F:77:8C:B7:F3:BC:24:D7:A4:91:C6:91:EC:02:26:2F:10:B6:E8:94:5E:98:2D:44:71:62:77:33:D8
- Chain
- YE1 → Root YE → ISRG Root X2 → 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 Sep 6, 2026.
Never get surprised by runa-masi.de's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch runa-masi.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.