advancedTechnical
Wildcard DNS
A DNS record using * to match any subdomain that doesn't have a specific record.
By DomainGlossary EditorialLast updated Mar 27, 2026
A wildcard DNS record matches all subdomains that don't have a specific record configured, using an asterisk (*) as the subdomain. For example, *.example.com with an A record pointing to a specific IP means any subdomain (blog.example.com, shop.example.com, etc.) resolves to that IP. Wildcard records are useful for multi-tenant applications where subdomains are created dynamically.