Each domain name which is registered and hosted has a great deal of DNS records - some of them are set up automatically when you host a domain, others can be created manually if necessary. As an illustration, the A record of a domain name is its IP address i.e. this record shows where the website is situated; the MX records show where the emails are stored, while using an SRV record you can use a domain name for unconventional purposes, such as a Voice-over-IP service. To be able to set up and modify specific records permits you to have different services with different companies if, for example, your current host provides dependable web hosting, but has difficulties with the email service, or you simply prefer to get a particular service from a specific company. Although you must be able to create and edit these records freely and with no restrictions as you own a given domain, some companies charge extra to give you this option.