xxd(1) on macOS
The text 2e12c5a5c63a, as macOS 15.1, macOS 15.0, macOS 14.6, macOS 14.5, macOS 14.4, macOS 14.3, macOS 14.2 shipped it.
make a hex dump or do the reverse.
Flags it lists
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-C -
-E -
-EBCDIC -
-R -
-a -
-autoskip -
-b -
-bits -
-capitalize -
-e -
-h -
-help -
-i -
-include -
-o -
-p -
-plain -
-postscript -
-ps -
-r -
-revert -
-s -
-seek -
-u -
-v -
-version