PTR record
A DNS record that maps an IP address back to a name, used for reverse lookups.
In more detail
dig -x address asks for it. Mail servers and logging tools often check that a sender's PTR record matches its forward name.
Related terms
- DNS — The system that turns names such as learnsome.tech into IP addresses.
Taught in
- Clocks, Names, Addresses And Pages: The Services Every Depot Runs — CompTIA Linux+ (XK0-006) Exam Prep