SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ec2-44-233-218-220.us-west-2.compute.amazonaws.com
SSL/TLS Certificate
SSL/TLS Certificate for ec2-44-233-218-220.us-west-2.compute.amazonaws.com
Self-signed- Issued by (CA)
- Unspecified
- Subject
- ip-172-31-26-142.us-west-2.compute.internal
- Valid from
- Mar 23, 2026
- Valid until
- Mar 23, 2027 (241 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 31AAF1D9B8346886
- SHA-256 fingerprint
- F3:EE:48:5D:D8:18:C4:2C:FD:13:F9:2A:16:0B:4F:B3:18:F9:09:80:7B:44:BF:BB:23:AD:B6:20:E3:D0:97:F4
- Chain
- ip-172-31-26-142.us-west-2.compute.internal
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by ec2-44-233-218-220.us-west-2.compute.amazonaws.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ec2-44-233-218-220.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.