For Denon, go here, then Downloads then IR Command Chart.
[Link: usa.denon.com]
Odds are your old Denon codes will still work fine. Have you actually tried them?

Here are the Samsung codes. They haven't changed in many, many years.
[Link: remotecentral.com]

I don't understand what you're saying about numerical codes. On remotes, numerical codes are the only kind of codes.

Hopefully a Pronto user can assist with the rest.