Location and keypad code for 8 Digit Stash called Fence's Stash in Prypiat of Stalker 2.

Location

8 Digit Stash is located in the Prypiat, the building in right of the area on top of Sunny Kindergarten.

Go up way to the last floor to see the keypad.

Code

Type 13263622 and press enter. The code is 13263623 but you need to enter 2 for the last number because of how this keypad works. [Source]

Reward

Medkit, Ammo, Grenade, Food and Gauss Gun