A narrow Hajin shopping alley in the rain in MW4 DMZ: neon shop signs, paper lanterns, a wrecked car and rubble on the wet tiles

MW4 DMZ guides

MW4 DMZ Grid Vaults: Hanex Tower Codes, Supply Drop

The Grid's vaults are the two vault rooms upstairs in the Hanex Bank tower, grid G6. Each opens with a six-digit code written on a note in a locked office, the Design Center Director's Office or the Netshin Security Office. The notes inside the vaults then make the code for the computer on the DBN Headquarters roof, which calls in a supply drop.

The four steps Netshin Security Office key

Last updated November 5, 2026Game version: Launch (October 23, 2026)

The four steps

Find the Design Center Director's Office key at Minsok Art School and read the note in that office.
Find the Netshin Security Office key in Hotel Lucera and read the note in that office.
Go up the Hanex Bank tower and open each vault with its office code. Pick up the two numbered notes inside.
Join the two vault notes into one code and enter it on the DBN Headquarters roof for the supply drop.

The digits change from match to match, so write down what your own notes say: a code from another match is not the one your vaults want. A photo or screenshot of each note saves mixing them up on the way across The Grid.

1. The Design Center Director's Office

The key lies at Minsok Art School, in The Grid: search the roof first, then the floor below it. Take it to the Hanwoori Design Complex, ride the elevator up and open the office with the Design Center Director's Office prompt. Its note holds the code for the left-hand vault.

The same complex has another lock, the Hanwoori Art Records Room, which takes a different key and has nothing to do with the vaults.

2. The Netshin Security Office

The Netshin Security Office key is a Rare key, and it turns up in Hotel Lucera, grid H7: look in guest room 702 or 703 on the upper floors. Room 703 is the same suite whose bedroom takes the Lucera Suite 703 Bedroom key, but you do not need that key for this one.

The office is on level 14 of the Netshin Tech Complex, grid G6. Take the elevator up, cross the hall and go down one floor to the door. Inside there is nothing to loot but the note with the six-digit code for the second vault. The tower is heavily guarded, but the office can be reached by sneaking through; how the rest of the building runs is in our Netshin Tech Complex guide.

3. The two vaults in the Hanex Bank tower

Climb the Hanex Bank tower to the vault floor and type each office code into its own vault. Between them the two vaults hold five safes and cash. Search for two notes marked 1/2 and 2/2: each gives three digits of the final code.

The guard room near the vaults is a separate lock with its own key, the Hanex Guard Station, and the Hanex Bank branches in Cheongun Village, by Wolves Stadium and in Songdo Wharf open a different way: a Car Battery, a keycard and a four-digit code, all in our Hanex Bank vault code guide. Every bank is marked on the interactive Hajin map under Banks.

4. The computer on the DBN Headquarters roof

Put the note 1/2 digits first and the note 2/2 digits after them, keeping a zero if a note starts with one. Then get to the roof of DBN Headquarters and use the computer beside the helipad: enter the six digits and a plane flies over to drop a care package. This last code is also known as the Split Authorization Code.

The roof is a long climb at the end of a long chain, so check where you can exfil before you start up, and keep your armor topped up: DBN Headquarters is one of the places Lieutenant Roze has been fought.

Questions

How do you open the Grid vaults in MW4 DMZ?

Each of the two vaults upstairs in the Hanex Bank tower takes a six-digit code from a note in a locked office: one in the Design Center Director's Office, one in the Netshin Security Office. Get both office keys, read both notes, then type each code into its vault.

Where is the Netshin Security Office key?

In Hotel Lucera, in guest room 702 or 703 on the upper floors. It is a Rare key, and it opens an office on level 14 of the Netshin Tech Complex, grid G6.

Where is the Design Center Director's Office key?

At Minsok Art School: search the roof and the floor below it. The office it opens is in the Hanwoori Design Complex, up the elevator.

What does the DBN rooftop code do?

The two notes inside the vaults hold three digits each. Put them together, first note first, and enter the result at the computer next to the helipad on the DBN Headquarters roof: a plane flies over and drops a care package.