Just posting this here for reference for those who play WZ. Thanks to Karrde for originally posting them in discord.

Grid Ref: H8 - Prison shack code: 72948531
Grid Ref: H6 - Farmland code: 49285163
Grid Ref: B7 - South Junkyard: 97264138
Grid Ref: B5 - North Junkyard: 87624851
Grid Ref: F8 - Park - 60274513
Grid Ref: F4 - TV Station - 27495810