dnstracer(8) on Linux
The text bcb0bf659b2d, as Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze) shipped it.
trace a chain of DNS servers to the source
Flags it lists
-
-4 -
-C -
-S -
-c -
-o -
-q -
-r -
-s -
-v