Finding player's nickname with ID

Hello, is there any way to find player's nickname when I only have his ID?

PServer or Official?
Go to The Database in PServer and search the ID in the Created Chars file
Offical= Unpossible

Official
So I can't do this, right? Crap :/

If you mean User ID, it's simply, just send:
req_info 1 <USER_ID>
If you mean Account ID you need PW too.

But
req_info 1 <id>
only works when he's on the same map and channel (and of course - online)
I wan't to find user ID when he's offline.

Impossible.

it's not possible on the official server