What is a DNS PTR record?
The ‘pointer’ record is exactly the opposite of the ‘A’ record; the PTR address will give you the domain associated with a given IP address. The PTR record is used in reverse-lookup zones for reverse DNS searches.
Example of an PTR record:
The value here represents an email address ,which can be confusing because it’s missing the ‘@’ sign, but in an SOA record admin.example.com is the equivalent of firstname.lastname@example.org.