What are all the AUX Codes for Dish Network?

You need to be more specific. The codes are different for the remote model and the component you want to use for the AUX for. You can perform a power scan to try and locate a code already programmed in the remote.

Address To Other Equipment Using Power Scan

• Remote: All Remotes (except Basic)
  1. With the desired equipment on, press and hold the correct Mode button until all mode button back lights illuminate, then release.
  2. Press and release the Power button. AUX Mode: Before pressing and releasing the Power button
     • Press 0 for a TV
     • Press 1 for a VCR/DVD
     • Press 2 for any other device
     Then Press STAR (*)
  3. Press the Up button once a second while pointing the remote at the desired equipment. Note: If the code for the equipment comes up, the equipment will power off.
  4. Press the POUND (#) button. Note: If the code entered is valid for the remote, the mode light flashes three times