Having total control of your domain names is something really important and being able to access and edit the DNS records for every single one of them is one of the things you should look for when you search for a registration or a shared hosting provider. Perhaps you have heard of the so-called “name servers” that show where a domain address is hosted, but below them there's a whole list of records, such as the A record, which is the IP address of the server hosting the website, and the MX records, which show the server that deals with the e-mails for a particular domain address. These records are used if you wish to have your website with one provider and the emails with another, for instance. Additionally you can use a domain address for a non-website service or direct the traffic to it by using special records. Some companies ask for an additional fee to provide access to edit specific DNS records apart from the name servers.