The phrase "dost number on" does not have a clear meaning in English. However, if we consider "dost" as a variant of the word "dust" and interpret "number on" as "marking or labeling something," then potential antonyms could be "clean" or "wipe" instead of "dust," and "remove label" or "erase marking" instead of "number on." However, without a clear context, it's challenging to determine precise antonyms for this phrase. Therefore, it is essential to clarify the intended meaning to identify relevant antonyms.