SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ec2-44-242-123-54.us-west-2.compute.amazonaws.com
SSL/TLS Certificate
SSL/TLS Certificate for ec2-44-242-123-54.us-west-2.compute.amazonaws.com
Hostname mismatch- Issued by (CA)
- Let's Encrypt
- Subject
- www.toast442.org
- Valid from
- Jun 20, 2026
- Valid until
- Sep 18, 2026 (56 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 05F4F55A51717CA26208E00A4E7966D8D0AD
- SHA-256 fingerprint
- 39:C9:E9:05:24:1D:D7:8A:DD:D8:EC:86:E2:7B:17:C2:1C:74:26:A2:87:04:F9:73:99:AD:CC:32:B3:29:9E:5F
- Chain
- YR1 → Root YR → ISRG Root X1
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
This certificate has been served since Jul 23, 2026.
Never get surprised by ec2-44-242-123-54.us-west-2.compute.amazonaws.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ec2-44-242-123-54.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.