SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ec2-13-54-252-150.ap-southeast-2.compute.amazonaws.com
SSL/TLS Certificate
SSL/TLS Certificate for ec2-13-54-252-150.ap-southeast-2.compute.amazonaws.com
Hostname mismatch- Issued by (CA)
- Let's Encrypt
- Subject
- booksbygentlenergy.com.au
- Valid from
- Oct 9, 2026
- Valid until
- Jan 7, 2027 (56 days remaining)
- Public key
- EC 256-bit
- Serial
- 062E2C12EB99B8731EC272C0360EB44C9961
- SHA-256 fingerprint
- 90:83:AC:76:54:D9:67:5F:75:5A:C4:D9:9E:20:AE:D6:B7:9A:68:02:A0:CE:D6:23:0B:A4:EC:09:2C:5C:F2:A0
- Chain
- YE1 → Root YE → ISRG Root X2 → 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 ec2-13-54-252-150.ap-southeast-2.compute.amazonaws.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ec2-13-54-252-150.ap-southeast-2.compute.amazonaws.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, 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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.