Can you tell us the frequencies where Morse Code may not be used?


Most anywhere, exceptions like 60m do exist. However, it would be a
wise move to pick frequencies where other hams usually do CW, in
accordance with various band plans. After all, the whole point is to
find other hams to work CW with, and that probably won't happen in the
middle of a phone subband. Or on a 2m frequency that happens to be a
repeater input...