Name server – Wikipedia

A name server refers to the server component of the Domain Name System (DNS), one of the two principal namespaces of the Internet.The most important function of DNS servers is the translation (resolution) of human-memorable domain names (example.com) and hostnames into the corresponding numeric Internet Protocol (IP) addresses (93.184.216.34), the second principal name space of the Internet …

https://en.wikipedia.org/wiki/Name_server