New TV in room without a cable box -- what are all the "dash channels"?

The dash channels are the digital channels picked up by your TV's QAM tuner.  They are the OTA feeds being rebroadcast I think, so this will at-least channels there "could be" but as for a list of what channels they actually do rebroadcast....good luck. Its not something they post publicly, but a engineer can look it up for you possible, or maybe find it via google.

http://en.wikipedia.org/wiki/List_of_television_stations_in_Arizona

Sub-channels are in right column. For example, 3 is KTVK, 3-1 is KTVK-DT, and 3-2 is This TV.

See also http://www.stationindex.com/tv/markets/Phoenix

The locals (HD and SD sub-channels) are listed here by Virtual Channel #

http://www.silicondust.com/hdhomerun/lineup_web/US:85016#lineup_9774598

There are also several other 'Dash" channels that are just Digital SD versions of some of the channels. Nothing very interesting, like HSN and QVC

WGN HD is the only HD non-Local that is unencrypted.
WGN HD = 79-3