I was wondering if I could use ip or host to get nickname on a network. Some command perhaps? /whois and /dns gives you info from nick, but is there some commands that gives info from ip/host?
/who *host might work, but there's a 90% chance it won't since it doesn't return users who are +i (invisible). You can look at /lusers to see how many users are +i on the network.
- argv[0] on EFnet #mIRC - "Life is a pointer to an integer without a cast"
No general way, nope. IRCOPs have (on some IRCDs at least) access to /who-flags that allow a host/IP search. And some networks feature a "seen"-service that allows wildcard- or host- based searches. Best would be to join the network's help channel and ask