Any active domain which is added in a hosting account has a variety of records that permit it to perform properly. In the general case, the name servers (NS records) show the location where the domain name is hosted and they're set on the side of the registrar company, but on the lower level there are certain records set through the hosting company such as A (IP address of the website/server), MX (email server), SRV (employing an Internet domain for non-website purposes on a particular port number like Voice-over-IP), and so on. Having access to these records and by being able to modify them, you could have your site with company A and your e-mail messages with company B, for illustration. This offers you more independence since you can choose the best provider for every single one of these services and you do not have to stick with only one company. After you pick a hosting company, you have to make certain that you have access to all DNS records freely because some providers have an extra fee for this function.