Yes. An astersisk followed by a period (*.) can be used as a wildcard when adding domains to your project. For example, if you would like to use Web fonts on www.example.com, abc.example.com and def.example.com, simply specify *.example.com as your domain. This will address the two aforementioned subdomains and any others that are used. Subdomains can also be added to your project individually. However, you must specify either the root domain with the wildcard (*.example.com) or the subdomain directly (abc.example.com) in order for Web fonts to display on a subdomain.