ssh-keyscan(1) on macOS
The text 66fccbb1ce45, as OS X 10.11.6, OS X 10.11.5, OS X 10.11.4, OS X 10.11.3, OS X 10.11.2, OS X 10.11.1, OS X 10.11 shipped it.
gather ssh public keys
Flags it lists
-
-4 -
-6 -
-H -
-T -
-f -
-p -
-t -
-v