arp(8) on macOS
The text 11712da09cfa, as Mac OS X 10.6.8, Mac OS X 10.6.7, Mac OS X 10.6.6, Mac OS X 10.6.5, Mac OS X 10.6.4, Mac OS X 10.6.3, Mac OS X 10.6.2, Mac OS X 10.6.1, Mac OS X 10.6 shipped it.
address resolution display and control
Flags it lists
-
-a -
-d -
-f -
-i -
-n