Any active domain name which is added in a hosting account includes a number of records that permit it to function properly. In the standard case, the name servers (NS records) show the location where the domain is hosted and they're set on the side of the registrar company, but on the lower level there are particular records created through the hosting company such as A (IP address of the website/server), MX (e mail server), SRV (employing a domain address for non-website purposes on a certain port number like Voice-over-IP), and many others. With access to these records and by having the ability to edit them, you could have your web site with company A and your e-mail messages with company B, for illustration. This gives you more flexibility because you can select the best provider for every one of these services and you do not have to stick to only one company. After you pick a hosting company, you have to make certain that you can access all DNS records freely as some companies have an additional fee for this feature.