whois(1) on macOS
The text d4b8252e14a1, as Mac OS X 10.3.9, Mac OS X 10.3.8, Mac OS X 10.3.7, Mac OS X 10.3.6, Mac OS X 10.3.5, Mac OS X 10.3.4, Mac OS X 10.3.3, Mac OS X 10.3.2, Mac OS X 10.3.1, Mac OS X 10.3 shipped it.
Internet domain name and network number directory service
Flags it lists
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-6 -
-A -
-Q -
-R -
-a -
-c -
-d -
-g -
-h -
-i -
-l -
-m -
-p -
-r