Having total control over your domain names is something quite crucial and being able to access and edit the DNS records for any of them is one of the things you should look for when you search for a registration or a shared hosting provider. Maybe you have heard about the so-called “name servers” that show where a domain is hosted, but below them you will find a whole group of records, like 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 employed if you'd like to have your website with one company and the emails with another, for example. You may also use a domain address for a non-website service or direct the traffic to it through special records. Many companies ask for an additional payment to give access to edit certain DNS records besides the name servers.