You could also see which channels you qualify for on Dish's Superstations. Last I checked I think only the CW channels from New York, Denver, and Los Angeles were cleared for just about everyone, but not the Boston local nor the MyTV local in New York.
You can check on the Dish website or contact Dish by phone and ask about the Superstations, unless Dish no longer offers this, but I thought they still did as of last October.