SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
SSL/TLS Certificate for fix-u.fi
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- fix-u.fi
- Valid from
- Jun 19, 2026
- Valid until
- Sep 17, 2026 (40 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05679213750F638770724365F0A929A65F71
- SHA-256 fingerprint
- E2:D3:5D:B6:F8:D3:94:E7:44:76:D5:03:54:42:07:43:B7:0B:19:42:43:F7:F4:C7:2A:3F:1F:D0:32:FA:1E:1F
- Chain
- YR1 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by fix-u.fi's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch fix-u.fi 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.