flightaware.com/live/flight/WWW210 is kinda weird.
Also, if you look at:
flightaware.com/live/findflight/KTNX/KLAS
they run one one of these more than once an hour. Is this some kind of military shuttle thing?
That’s the shuttle for employees to get to “Area 51.”
That’s the shuttle for employees to get to “Area 51.”
Also known as the Janet flights. They operate B737s and Beech turboprops IIRC. Check out this site for info-
http://www.dreamlandresort.com/
Go to Area 51 FAQ on the left toolbar and click “What are the Janet flights.”
Regards
JetBlast 
There’s also a lot more discussion of this topic on other FA forums. Search for forums for “Janet” and you’ll find it.