SSL/TLS Certificate Lookup

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

ec2-52-43-21-183.us-west-2.compute.amazonaws.com

SSL/TLS Certificate

SSL/TLS Certificate for ec2-52-43-21-183.us-west-2.compute.amazonaws.com

Hostname mismatch
Issued by (CA)
Let's Encrypt
Subject
prixel.ar
Valid from
Oct 8, 2026
Valid until
Jan 6, 2027 (53 days remaining)
Public key
RSA 2048-bit
Serial
0550C318A3F2517F466DF8337F8E9874FFC7
SHA-256 fingerprint
1F:43:F8:B5:AF:5E:4A:B7:51:89:4C:3B:E4:87:89:A7:5E:DE:89:EB:BE:A6:2A:C4:FD:2B:A6:88:81:F8:4E:E2
Chain
YR1 → Root YR → ISRG Root X1
Subject Alternative Names (1)
prixel.ar

Certificate Authority Authorization (CAA)

No CAA policy is published for this domain — any certificate authority may issue for it.

Never get surprised by ec2-52-43-21-183.us-west-2.compute.amazonaws.com's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch ec2-52-43-21-183.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.