NHP is on the State's NSRS trunked system, with various freqs. in the 854-868 mhz range. It is an EDACS system, the details can be found in the Database section of this site. The Las Vegas NHP units will show up in your display as 05-121 (Las Vegas 1), thru 05-130 depending on their assignment. Specific four digit numbers for the rank/assignment of a unit are also explained in the Database.