Also called "inverse DNS," the PTR record is an option. See reverse DNS. Two Name Server (NS) records identify the authoritative DNS servers for the domain. Required for redundancy, the secondary ...

nslookup is a command-line tool that helps to find DNS records of a website. It sends a name server query to the DNS and obtains the corresponding IP address. It can also perform some complex ...

Aging is a feature that allows identifying stale DNS records. It actually uses two intervals and a DNS record is considered as stale once both are elapsed. These intervals are: Non-Refresh ...