dnswalk(1) on Linux
The text 45f6743c5c5d, as Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 5.0 (Lenny), Debian 4.0 (Etch), Debian 3.1 (Sarge), Debian 3.0 (Woody), Debian 2.2 (Potato) shipped it.
A DNS database debugger
Flags it lists
-
-F -
-a -
-d -
-i -
-l -
-m -
-r