SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
s-act.com
SSL/TLS Certificate
SSL/TLS Certificate for s-act.com
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- s-act.com
- Valid from
- Jul 6, 2026
- Valid until
- Oct 4, 2026 (48 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05CAC52B5D91E52E7948671731A2569F2194
- SHA-256 fingerprint
- 88:DB:53:87:0B:C7:0F:4D:17:36:6B:1D:7F:61:AA:B9:35:BB:39:1B:9A:03:FF:5A:60:B4:CF:DC:E5:70:60:76
- 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.
Never get surprised by s-act.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch s-act.com 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.