who 0 o will give you a list of visable irc operators, so if you are not in a channel with them and they are +i you wont get their nick in the who reply.
you say you have a scanner so this is probably not needed:
raw 352:*:if (* isin $7) echo 4 -a $6 is an irc operator
raw 313:*:echo 4 -a $2 is an irc oper
