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 e-f.ca
Valid- Issued by (CA)
- Let's Encrypt
- Subject
- e-f.ca
- Valid from
- Aug 22, 2026
- Valid until
- Nov 20, 2026 (78 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05913C45D5C887B0C8BD9B94AF7B8E8C3546
- SHA-256 fingerprint
- D3:C7:4A:70:D9:43:0D:67:34:55:81:FB:63:02:5D:63:22:16:CF:2D:24:82:EB:EE:73:A7:2D:73:C6:F4:CE:70
- 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 e-f.ca's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch e-f.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.