od(1) on OpenBSD
The text b1b8182e21f3, as OpenBSD 7.1, OpenBSD 7.0, OpenBSD 6.9, OpenBSD 6.8, OpenBSD 6.7 shipped it.
octal, decimal, hex, ascii dump
Flags it lists
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-A -
-B -
-D -
-F -
-H -
-I -
-L -
-N -
-O -
-X -
-a -
-b -
-c -
-d -
-e -
-f -
-h -
-i -
-j -
-l -
-o -
-s -
-t -
-v -
-x