While the domains could be related to CarPlay, they could also be for Apple’s rumored electric vehicle. Visiting any one of the sites now simply says that the server can’t be reached.
As it stands, the Apple Car caught enough traction through the end of 2015 that many believed it was a foregone conclusion that it existed, and that Apple has every intention of launching its own vehicle at some point in the future. It’s known as “Project Titan†within the company, according to reports, and Apple has indeed been hiring professionals that could help bring a vehicle to market.
[Source]