SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ec2-52-9-21-221.us-west-1.compute.amazonaws.com
SSL/TLS Certificate
SSL/TLS Certificate for ec2-52-9-21-221.us-west-1.compute.amazonaws.com
Expired- Issued by (CA)
- Sectigo Limited
- Subject
- *.blastapp.net
- Valid from
- May 26, 2025
- Valid until
- Jun 26, 2026 (expired 139 days ago)
- Public key
- RSA 2048-bit
- Serial
- 125B0B8ACFC5276E9E54CBCE51D6E813
- SHA-256 fingerprint
- 1F:41:A0:0B:A5:7B:73:6C:7F:FB:72:32:EB:71:F6:12:68:1D:24:9D:7A:C7:4D:D4:0A:C5:14:C2:4F:AE:49:4C
- 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.
This certificate has been served since Nov 7, 2026.
Never get surprised by ec2-52-9-21-221.us-west-1.compute.amazonaws.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ec2-52-9-21-221.us-west-1.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.