I dunno man. From a screename standpoint, sure, but that's it. IRC and ICQ both showed your IP addresses 😂 If I remember correctly, for ICQ you just had to send a file, doing some sort of direct connect and boom, do a netstat and you'd get their IP address. Most IRC servers used to show your IP by default too. I eventually started to use screens and vhosts for this, but the masses never did.