multicat(1) on Linux
The text abbba6b7ab00, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster) shipped it. The page shows this text now.
Multicast equivalent of Netcat
Flags it lists
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-U -
-X -
-d -
-f -
-h -
-k -
-n -
-r -
-s -
-t -
-u