SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ec2-52-34-50-193.us-west-2.compute.amazonaws.com
SSL/TLS Certificate
SSL/TLS Certificate for ec2-52-34-50-193.us-west-2.compute.amazonaws.com
Expired- Issued by (CA)
- Sectigo Limited
- Subject
- aws.twitonomy.com
- Valid from
- Apr 20, 2020
- Valid until
- May 2, 2021 (expired 2015 days ago)
- Public key
- RSA 2048-bit
- Serial
- C6FE83838AB92AE1D37DA959D20BE4F9
- SHA-256 fingerprint
- FF:99:4E:17:93:8F:33:8F:8C:35:BF:BF:0E:3B:B2:F8:FB:71:93:D2:62:44:99:DB:11:AB:93:A3:09:90:2B:A0
- Chain
- Sectigo RSA Domain Validation Secure Server CA → USERTrust RSA Certification Authority
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by ec2-52-34-50-193.us-west-2.compute.amazonaws.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ec2-52-34-50-193.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.
Free for your first domain: uptime, DNS, and certificate together. No credit card.