A Name Server [NS] is a computer that does a DNS “lookup”, which is basically translating a domain name to an IP address. Name servers are our friends – they make DNS work.

A (Domain Name) Registrar is a place that gives out domain names.

An NS-Record is a name server record. Name server records are really important because they’re the ones that tell the computers where to look for all the A-Records and C-Names – they point to a name server that’s responsible for a domain. For example, google.com has one of their name servers at ns1.google.com. ns1.google.com stores all the A-Records and C-Names for google.com.