SSL/TLS Certificate Lookup

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

ec2-16-52-47-37.ca-central-1.compute.amazonaws.com

SSL/TLS Certificate

SSL/TLS Certificate for ec2-16-52-47-37.ca-central-1.compute.amazonaws.com

Hostname mismatch
Issued by (CA)
Let's Encrypt
Subject
ma2techsphere.com
Valid from
Sep 24, 2026
Valid until
Dec 23, 2026 (41 days remaining)
Public key
EC 256-bit
Serial
0626BBE5D03F952C89F44918239012470357
SHA-256 fingerprint
4D:AB:BB:A6:F8:87:5B:10:22:39:92:96:8A:2D:46:0F:AE:1A:D4:20:79:5B:6D:30:55:86:C1:52:EE:20:68:C1
Chain
YE2 → Root YE → ISRG Root X2 → ISRG Root X1
Subject Alternative Names (2)
ma2techsphere.com, www.ma2techsphere.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 10, 2026.

Never get surprised by ec2-16-52-47-37.ca-central-1.compute.amazonaws.com's certificate expiring

This is today's certificate. Turn on monitoring and we'll watch ec2-16-52-47-37.ca-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.