+ .
+ Perform PTR lookups on all of 198.41.0.4\/30:
+ .
+ @
+ $ hath reversed <<< 198.41.0.4\/30
+ 198.41.0.4: a.root-servers.net.
+ 198.41.0.5:
+ 198.41.0.6: rs.internic.net.
+ 198.41.0.7:
+ @
+ .
+ The DNS lookups are usually the bottleneck for this mode, but we can
+ perform them in parallel. Simply pass the number of threads to the
+ GHC runtime on the command line; for example, the following will
+ perform 25 lookups in parallel:
+ .
+ @
+ $ hath reversed +RTS -N25 <<< 198.41.0.4\/24
+ 198.41.0.4: a.root-servers.net.
+ 198.41.0.5:
+ 198.41.0.6: rs.internic.net.
+ ...
+ @
+ .
+ The command-line syntax and complete set of options are documented in
+ the man page.
+