ldns-walk(1) on Linux
The text 9d120176c21b, as Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch), Debian 8 (Jessie) shipped it.
Retrieve the contents of a DNSSEC signed zone
Flags it lists
-
-4 -
-6 -
-f -
-s -
-v