selection on symbol , then CTRL+C open konsole and type: xxd then <SHIFT+INSERT><CTRL+D>

you get something like: mariank@dd903c5n1 ~ $ xxd û0000000: fb

you know the symbol you pasted has hex code 0xfb

• select the symbol, then press CTRL+C
• open konsole
• and type: xxd<press enter>
• then press <SHIFT+INSERT><CTRL+D>

you get something like:

mariank@dd903c5n1 ~ $ xxd
û0000000: fb 

you know the symbol you pasted has hex code 0xfb