I expect you have learned some IR signals from those devices into your Pronto. Hopefully you know, or can figure out, how to get to the Pronto Hex string for a learned signal in ProntoEdit.

If you post a Pronto Hex string, many people here would know how to tell you the frequency. Or, you could get the IrTool program and paste in the pronto hex string and it will tell you the frequency.

What frequency range does your current IR Distribution system support?