ntpq(1) on Linux
The text eef07e735a3f, as Debian 9 (Stretch), Debian 8 (Jessie), Debian 7 (Wheezy), Debian 6.0 (Squeeze) shipped it.
standard NTP query program
Flags it lists
-
-4 -
-6 -
-c -
-i -
-n -
-p