The tool fetches DNS records of each nameserver. The DNS records of nameservers help web admins identify whether the nameservers' DNS records have been propagated correctly or not.
With the short abbreviation NS, Nameserver is the type of DNS server that stores all domain DNS records, including A records, MX records, CNAME records, etc.
All the domains that are on the internet rely on multiple nameservers. Suppose if one goes down, that second one is available to solve the DNS query.
Usually, there is one primary nameserver with several secondary nameservers at the back that stores the exact copy of the DNS records as of the primary nameservers.
Nameservers are the hosts specified at the registrar level. These hosts keep a record of all DNS records of a domain.
The DNS records provide essential information about the domain or hostname, particularly about its IP address and how to handle the requests for that domain. The most common DNS records type are