SSL/TLS Certificate Lookup

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

ec2-35-159-70-175.eu-central-1.compute.amazonaws.com

SSL/TLS Certificate

SSL/TLS Certificate for ec2-35-159-70-175.eu-central-1.compute.amazonaws.com

Hostname mismatch
Issued by (CA)
Let's Encrypt
Subject
pozar.org
Valid from
Oct 15, 2026
Valid until
Jan 13, 2027 (68 days remaining)
Public key
EC 256-bit
Serial
063F07ACE2397ECA0B8B9B3F1602C0F3DA3C
SHA-256 fingerprint
65:FC:8D:A2:11:65:3F:DE:93:6C:8C:39:17:A7:75:44:2C:10:25:CA:F0:D9:38:CA:8D:01:63:FA:7C:AC:4A:41
Chain
YE1 → Root YE → ISRG Root X2 → ISRG Root X1
Subject Alternative Names (2)
pozar.org, www.pozar.org

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 8, 2026.

Never get surprised by ec2-35-159-70-175.eu-central-1.compute.amazonaws.com's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch ec2-35-159-70-175.eu-central-1.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.