SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
cis-sci.ca
SSL/TLS Certificate
SSL/TLS Certificate for cis-sci.ca
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- cis-sci.ca
- Valid from
- May 24, 2026
- Valid until
- Aug 22, 2026 (31 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05AB66315CF74793F7A1CB4F306C3AAD2F96
- SHA-256 fingerprint
- 9C:88:E8:B6:0A:0D:C3:6C:B1:2A:98:41:F9:83:A9:50:E3:90:D5:D0:6C:09:D0:9E:64:98:F7:97:3E:8B:8F:7F
- Chain
- R13 → 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 cis-sci.ca's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch cis-sci.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, 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.