ANDROID/ LG G3- Bought unlock code used it, would flashing roms/revert stock firmware lose unlock?

[AC Question]

I bought unlock code for my lg g3...used it when rooted. I am planning to go to lollipop and have to reflash to stock firmware and unroot. Would changing reset factory firmware / unroot lose my unlock code that i used? or is it deeper in the system that it my unlock code remains safe?