From GameWatcher: “Fallout 76 is out now, and the most fun you can possibly have in the game is launching nuclear weapons at your enemies – just like in real life. To do that in the game you’ll need Fallout 76 Nuke Codes. But where do you get them?”
Source: N4G PC Fallout 76 Nuke Codes – Site Alpha, Bravo and Charlie Nuke Code Revealed