SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ec2-100-21-196-165.us-west-2.compute.amazonaws.com
SSL/TLS Certificate
SSL/TLS Certificate for ec2-100-21-196-165.us-west-2.compute.amazonaws.com
Self-signed- Issued by (CA)
- Acme Co
- Subject
- Kubernetes Ingress Controller Fake Certificate
- Valid from
- Nov 11, 2026
- Valid until
- Nov 11, 2027 (360 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 48DD4F50C32E76CEE8349D7700BD4898
- SHA-256 fingerprint
- 4F:9B:CD:37:FA:CB:1E:F6:4F:1C:F6:73:47:66:17:85:15:D5:FB:82:F6:5B:D1:83:9B:A7:0E:04:06:04:50:52
- Chain
- —
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by ec2-100-21-196-165.us-west-2.compute.amazonaws.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ec2-100-21-196-165.us-west-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.
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