Wildcard SSL certificates are designed to secure a domain and its first-level subdomains. A wildcard SSL check helps confirm whether the certificate covers the hostname you expect.
A wildcard certificate typically covers a domain such as *.example.com, allowing many first-level subdomains to use the same certificate.
Use wildcard SSL checks when securing multiple subdomains, deploying shared certificates, or diagnosing why one subdomain is trusted while another is not.
Check whether the hostname being tested fits within the wildcard scope and whether the certificate served is valid and trusted.
Typical issues include expecting wildcard coverage for unsupported levels, serving the wrong certificate on a subdomain, and certificate mismatch after infrastructure changes.
Once you understand what to look for, run a live check using the tool below.
Launch SSL CheckerIt is a certificate designed to cover a domain and many of its first-level subdomains.
No. It usually covers only one subdomain level unless otherwise designed.
This page explains the purpose of the check, what results mean, and what problems to watch for before you run the live tool.
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