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Yes, Cloudflare can support the use of a DNS record suffix with a wildcard character. This is known as a wildcard DNS record and it allows you to create a record that matches any subdomain that doesn't have a specific record defined. For example, if you create a wildcard record for '.example.com' and someone tries to access 'foo.example.com', the wildcard record will match and direct the request to the specified location. To set up the wildcard record in Cloudflare, you can create a CNAME or A record using an asterisk () in place of the subdomain name.