logresolve(1) on macOS
The text 16215077a861, as Mac OS X 10.8.4, Mac OS X 10.8.3, Mac OS X 10.8.2, Mac OS X 10.8.1, Mac OS X 10.8, Mac OS X 10.7.5 shipped it.
Resolve IP-addresses to hostnames in Apache log files
Flags it lists
-
-c -
-s