Supposing you want to register the domain name of a NBA rising star, you may want to register all the top-level domain (e.g. .com, .xxx, .org, .net, and etc.).
Supposing you want to register the domain name of your hobby, you find many top-level domain of your hobby have been registered, you may wonder whether any other top-level domains are available.
Then you need bulk search for domain names.