SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ec2-52-36-166-251.us-west-2.compute.amazonaws.com
SSL/TLS Certificate
SSL/TLS Certificate for ec2-52-36-166-251.us-west-2.compute.amazonaws.com
Self-signed- Issued by (CA)
- example.com
- Subject
- example.com
- Valid from
- Nov 14, 2012
- Valid until
- Nov 12, 2022 (expired 1349 days ago)
- Public key
- RSA 2048-bit
- Serial
- B3F13DFBDBA2D8B2
- SHA-256 fingerprint
- DE:0F:60:29:21:87:77:B6:CC:16:CA:FE:B7:D8:EC:F3:21:BE:DE:62:B0:EC:6A:B2:B4:B1:69:04:60:FF:21:58
- Chain
- example.com
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by ec2-52-36-166-251.us-west-2.compute.amazonaws.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ec2-52-36-166-251.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, 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.