SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ec2-52-64-13-223.ap-southeast-2.compute.amazonaws.com
SSL/TLS Certificate
SSL/TLS Certificate for ec2-52-64-13-223.ap-southeast-2.compute.amazonaws.com
Hostname mismatch- Issued by (CA)
- Let's Encrypt
- Subject
- alertmanager.lukegt.com
- Valid from
- Jul 28, 2026
- Valid until
- Oct 26, 2026 (79 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05D97AED4D0440CB2E8B4E02F482EA999026
- SHA-256 fingerprint
- 94:75:ED:DD:75:27:A0:FA:2A:B0:39:38:CC:AB:67:08:54:89:00:F5:0D:5D:A3:C7:11:9D:9F:41:83:84:FF:9C
- 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 ec2-52-64-13-223.ap-southeast-2.compute.amazonaws.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ec2-52-64-13-223.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, 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.
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