xxd(1) on macOS
The text 28f4fa5a45d8, as macOS 26.5, macOS 26.4, macOS 26.3, macOS 26.2, macOS 26.1, macOS 26.0, macOS 15.6, macOS 15.5, macOS 15.4, macOS 15.3, macOS 15.2 shipped it. The page shows this text now.
make a hex dump or do the reverse.
Flags it lists
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-C -
-E -
-EBCDIC -
-R -
-a -
-autoskip -
-b -
-bits -
-capitalize -
-d -
-e -
-h -
-help -
-i -
-include -
-o -
-p -
-plain -
-postscript -
-ps -
-r -
-revert -
-s -
-seek -
-u -
-v -
-version