Each domain name which is registered and hosted has a lot of DNS records - some of them are set up automatically when you host a domain, others can be created manually if necessary. For example, the A record of a domain name is its IP address i.e. this record reveals where the site is located; the MX records show where the emails are handled, while through an SRV record you can use a domain address for unconventional purposes, for instance a Voice-over-IP service. The ability to create and modify specific records enables you to have different services with different companies if, for illustration, your present host provides dependable web hosting, but has issues with the email service, or you simply prefer to get a particular service from a specific company. Although you will be able to set up and modify these records freely and with no limits as you own a given domain address, lots of companies charge extra to give you this option.