Ultraviolet code territories

[Reeder]

I recently received a code from someone and I'd like to redeem it but when I type it into Flixster it says that this code is for a different territory. I asked the guy who gave it to me if he knew which territory it was for and he didn't (he got it from someone else). Is there a way to find out which territory a digital code belongs to, so that I can change my proxy to that territory and redeem it?

And by the way, Vudu says the code is invalid. Is that common?.....for Flixster to tell me the code is for a different territory and Vudu to tell me it's invalid?