dnssec-dsfromkey(8) on macOS
The text 7d4703312250, as Mac OS X 10.6.8, Mac OS X 10.6.7, Mac OS X 10.6.6, Mac OS X 10.6.5, Mac OS X 10.6.4, Mac OS X 10.6.3, Mac OS X 10.6.2, Mac OS X 10.6.1, Mac OS X 10.6 shipped it.
DNSSEC DS RR generation tool
Flags it lists
-
-1 -
-2 -
-a -
-c -
-d -
-s -
-v