Syntax
lookupptr(string)
Description
The lookupptr() function returns an array of domain names for a given IP address.
If no record is found, an empty array is returned
Example
println(lookupptr("216.58.201.99"))
println(lookupptr("8.8.8.9"))
["prg03s02-in-f99.1e100.net.", "lhr48s48-in-f3.1e100.net.", "prg03s02-in-f3.1e100.net."]
[]