Having 100 % control of your domains is something rather 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 web hosting provider. Maybe you have heard about the so-called “name servers” that show where a domain address is hosted, but below them you will find a whole set of records, for example the A record, which is the IP address of the server hosting the website, and the MX records, which show the server that handles the e-mails for a certain domain. These records are employed if you'd like to have your website with one company and the emails with another, for example. You can also use a domain name for a non-website service or direct the traffic to it through special records. Some companies ask for an extra fee to grant access to edit certain DNS records besides the name servers.