Each and every domain name which is registered and hosted has quite a lot of DNS records - some of them are set up automatically when you host a domain, others can be set up manually if required. As an illustration, the A record of a domain address is its IP address i.e. this record reveals where the site is situated; the MX records show where the emails are handled, while through an SRV record you can use a domain name for unconventional purposes, like a Voice-over-IP service. The ability to create and modify particular records allows you to have different services with different companies if, for instance, your current host provides dependable web hosting, but has difficulties with the email service, or you simply prefer to get a specific service from a certain company. Although you must be able to create and modify these records freely and without any limitations as you own a given domain, lots of companies charge extra to give you this option.