host(1) on OpenBSD
The text 21a552328775, as OpenBSD 6.9, OpenBSD 6.8, OpenBSD 6.7 shipped it.
DNS lookup utility
Flags it lists
-
-4 -
-6 -
-C -
-N -
-R -
-T -
-V -
-W -
-a -
-c -
-d -
-i -
-l -
-m -
-r -
-s -
-t -
-v -
-w