SSL/TLS Certificate Lookup
Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted
ec2-44-226-161-56.us-west-2.compute.amazonaws.com
SSL/TLS Certificate
SSL/TLS Certificate for ec2-44-226-161-56.us-west-2.compute.amazonaws.com
Hostname mismatch- Issued by (CA)
- Amazon
- Subject
- arc-zonal-shift-gamma-az1.us-west-2.api.aws
- Valid from
- Oct 8, 2026
- Valid until
- Apr 24, 2027 (162 days remaining)
- Public key
- RSA 2048-bit
- Serial
- 4094858AD4146A2C6D04B473555A09F2
- SHA-256 fingerprint
- D6:2C:85:1C:62:74:DD:CC:C5:32:4A:EA:21:CB:30:D4:16:03:DC:DB:E3:D2:99:FF:68:4D:D6:18:50:BE:AA:D2
- Chain
- Amazon RSA 2048 S18 → Amazon Root CA 1 → Starfield Services Root Certificate Authority - G2
Certificate Authority Authorization (CAA)
No CAA policy is published for this domain — any certificate authority may issue for it.
Never get surprised by ec2-44-226-161-56.us-west-2.compute.amazonaws.com's certificate expiring
This is today's certificate. Turn on monitoring and we'll watch ec2-44-226-161-56.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.