mactelnet(1) on Linux
The text f1a1abbfed35, as Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster), Debian 9 (Stretch) shipped it.
A tool for telneting via MAC addresses
Flags it lists
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-A -
-a -
-h -
-l -
-n -
-p -
-t -
-u -
-v