The Name Servers of a domain name show the DNS servers that manage its DNS records. The IP of the web site (A record), the mail server that takes care of the emails for a domain (MX records), any text record in free form (TXT record), forwarding (CNAME record) and so on are taken from the DNS servers of the website hosting company and for any Internet domain to be using them and to be directed to their hosting platform, it has to have their name servers, or NS records. If you wish to open an Internet site, for instance, and you input the URL, the Internet browser connects to a DNS server, which keeps the NS records for the domain name and the request is then redirected to the DNS servers of the hosting provider where the A record of the site is retrieved, enabling you to look at the content from the proper location. Ordinarily a domain address has two name servers that start with NS or DNS as a prefix and the contrast between the two is simply visual.