Las Vegas, NV
 

Several corrections could be made to your database for Las Vegas stations.

KSNV is rf 22, with a virtual to 3.

KVMY is rf channel 2 with a virtual to channel 21.

KHMP rf and virtual 18 is temp off air.

Las Vegas update
 

Here's more up-to-date info for Las Vegas, NV:

KVVU rf 9 virtual 5;
KMCC rf 32 virtual 34 (both Las Vegas and Dolan Springs transmiters;
KLVD rf 23 virtual 23;
KELV rf 15 virtual 27;
KNBX rf 14 virtual 31;
KHMP rf 18 virtual 18 (temp silent);
KHDF rf 19 virtual 19;
K41IO rf 41 virtual 41;
KEGS rf 24 virtual 30;
K42FO rf 43 virtual 43;
KLSV rf 50; virtual 50;
KEEN rf 17 virtual 17;
KVPX rf 28 virtual 28.