# Use wildcards in alternate domain names
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When you add alternate domain names, you can use the \* wildcard at the beginning of a domain name instead of adding subdomains individually. For example, with an alternate domain name of \*.example.com, you can use any domain name that ends with example.com in your URLs, such as www.example.com, product-name.example.com, marketing.product-name.example.com, and so on. The path to the object is the same regardless of the domain name, for example:
+ www.example.com/images/image.jpg
+ product-name.example.com/images/image.jpg
+ marketing.product-name.example.com/images/image.jpg

Follow these requirements for alternate domain names that include wildcards:
+ The alternate domain name must begin with an asterisk and a dot (\*.).
+ You *cannot* use a wildcard to replace part of a subdomain name, like this: \*domain.example.com.
+ You cannot replace a subdomain in the middle of a domain name, like this: subdomain.\*.example.com.
+ All alternate domain names, including alternate domain names that use wildcards, must be covered by the subject alternative name (SAN) on the certificate.

A wildcard alternate domain name, such as \*.example.com, can include another alternate domain name that’s in use, such as example.com.