This guide will let you know how to find every Locked Door location in Call Of Duty MW2 DMZ. You just have to follow the simple steps below to do so.
The first thing you will need to do is open up the following link https://mapgenie.io/cod-warzone-2/map and you will find all locked door locations on the map.
You just need to take your cursor on the lock icon and it will show you the name of that location. You will have that same name on one of your keys, so you can check it out to open up the locked door.