What is the use of PTR?

A pointer (PTR) record is a type of Domain Name System (DNS) record that resolves an IP address to a domain or host name, unlike an A record which points a domain name to an IP address. PTR records are used for the reverse DNS lookup.Click to see full answer. In this regard, what is a PTR query?This tool is useful to perform reverse dns lookup queries and get PTR records from IP addresses. In fact PTR stands for POINTER and is a unique record in the DNS system that associates an IP address to a canonical hostname.Also Know, is PTR record necessary for mail server? Many mail servers will perform a reverse DNS lookup on the IP address that is attempting to connect to them. Therefore the mail server needs to have a PTR record associated with the IP address that it uses to communicate with other servers. The ‘owner’ of the IP address is the last host that responded to the DNS query. Likewise, people ask, how are PTR records created? A PTR record (Pointer Record) connects an IP address to a host name. A PTR record is therefore sometimes called Reverse DNS Record because it converts an IP address into a name. A PTR record can only be created on the nameservers managed by the owner of the IP address, and is only valid for static IP addresses.What is the difference between an A record and a PTR record?While the A record points a domain name to an IP address, the PTR record resolves the IP address to a domain/hostname. PTR records are used for the reverse DNS (Domain Name System) lookup. Scotland, UK. You can think of the PTR record as an opposite of the A record.