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 1-act.ca
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- 1-act.ca
- Valid from
- Sep 28, 2026
- Valid until
- Dec 27, 2026 (57 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 0604B5121F91C6A125CA20585B76FABAAD41
- SHA-256 fingerprint
- 13:D7:F2:1A:52:89:B8:D4:88:67:0D:A1:6D:B4:EF:69:A4:0C:54:A9:DB:02:BF:97:B7:BC:99:D9:30:08:04:FA
- 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.
We've observed 1 previous certificate for this host. This certificate has been served since Oct 20, 2026.
Never get surprised by 1-act.ca's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch 1-act.ca 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.
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