The NS (Name Server) records of a domain reveal which DNS servers are authoritative for its zone. Essentially, the zone is the selection of all records for the domain, so when you open a URL inside an Internet browser, your personal computer asks the DNS servers worldwide where the domain address is hosted and from which servers the DNS records for the domain name ought to be retrieved. That way a browser finds out what the A or AAAA record of the domain name is so that the latter is mapped to an IP and the website content is requested from the proper location, a mail relay server detects which server handles the e-mails for the domain (MX record) so that a message can be sent to the appropriate mailbox, etc. Any modification of these sub-records is done using the company whose name servers are used, so you can keep the web hosting and switch only your email provider for example. Every single domain address has no less than two NS records - primary and secondary, which start with a prefix such as NS or DNS.
NS Records in Cloud Hosting
If you use a Linux cloud hosting from our company and you include a new domain address within the account or transfer an existing one from another provider, you are going to be able to control its NS records easily using the Hepsia web hosting Control Panel, which comes with all shared accounts. You'll be able to change the current name servers or enter additional ones for a single domain address or even for a number of domain names at the same time with several mouse clicks. This is done via the feature-rich Domain Manager tool that is a part of Hepsia and the user-friendly interface will make it easy to handle your domain name even if it's the first you've ever registered. It takes just a click to see what name servers a domain name uses at the moment or if they are the correct ones to point a domain address to the hosting space on our end and with only a few mouse clicks more you'll even be able to register private name servers for any of the domain addresses that you own. For the latter option you can use the IP addresses of each company that you'd like the new NS records to point to.