This addon exposes your characters iLevel to a Broker aware viewer. It also scans the ilevel of any raid and party members and keeps track of people you group or raid who are from your server. If you are in a random it will show players from other servers with a (*) at the end of their name eg: "Draik (*)"
Options are available via either /dil or the ingame Interface | Addons menu.
You must have a LibDataBroker display to use this such as:
ElvUI
ChocolateBar
FuBar + Broker2FuBar
Titan Panel
Fortress
ButtonBin
DockingStation