SSL/TLS Certificate Lookup

Check a domain's SSL/TLS certificate — who issued it, when it expires, and whether the chain is trusted

ec2-44-237-212-9.us-west-2.compute.amazonaws.com

SSL/TLS Certificate

SSL/TLS Certificate for ec2-44-237-212-9.us-west-2.compute.amazonaws.com

Hostname mismatch
Issued by (CA)
DigiCert Inc
Subject
*.guthy-renker.com
Valid from
Oct 1, 2026
Valid until
Apr 17, 2027 (161 days remaining)
Public key
RSA 2048-bit
Serial
0AF145A8342E24C5F8B22EB6269B1D71
SHA-256 fingerprint
68:27:EA:F8:61:A8:82:87:3B:E1:B9:9F:9C:48:A1:D9:D4:28:E4:A2:12:DB:ED:B3:96:C1:92:18:9D:C8:92:22
Chain
DigiCert Global G2 TLS RSA SHA256 2020 CA1 → DigiCert Global Root G2
Subject Alternative Names (2)
*.guthy-renker.com, guthy-renker.com

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 Oct 19, 2026.

Never get surprised by ec2-44-237-212-9.us-west-2.compute.amazonaws.com's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch ec2-44-237-212-9.us-west-2.compute.amazonaws.com continuously, notifying you the moment anything moves across all three signals:

Certificate monitor showing the issuer, expiry date, chain status, fingerprint, covered names, and a history of a rotation and an expiry warning

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.

Monitor this certificate free

Free for your first domain: uptime, DNS, and certificate together. No credit card.