MW4 DMZ Keypad Codes: Where to Find Them in Shopping Hacks, Iron Citadel and Grid Assault

In Call of Duty: Modern Warfare 4’s DMZ story missions, there is no universal keypad number to look up and enter. The story-mission keypads take a code the game generates for your match, and the same keypad has taken different codes in different matches. Find the code during the mission; afterward, it stays visible on screen. This guide covers three story-mission keypads; it is not a complete list of DMZ keypads. For where each mission starts, see the DMZ story missions guide.

Quick answer: Check for the code during your match. After you find it, the digits appear in the objective line or HUD, letting you enter them directly without taking notes.

Mission	Location	Where the code comes from
Operation Shopping Hacks	NuriGO Mall	Laptop note at the encampment
Operation Iron Citadel	Chang-san Air Base Bunker	Three transfer slips
Operation Grid Assault	DBN Headquarters, The Grid	Two code segments from targets

Why a copied MW4 DMZ keypad code fails

A code posted online belongs to someone else’s match. The numbers below are examples of how the codes have differed between matches.

In one match, Shopping Hacks displayed “Use Code 1438 to Unlock Mall Security”; in another, it showed “Use Code 4937 to Unlock Mall Security”.
Across matches, the Iron Citadel armory keypad has required 572851 once and 125815 another time.
The Iron Citadel slips do not line up between matches either. One slip read “Second Segment: 28” and another read “Third Segment: 15”.

Operation Shopping Hacks: Mall Security keypad code

The mall security code comes from a laptop at NuriGO Mall, early in the Operation Shopping Hacks walkthrough. The keypad that takes it is in the underground parking area.

Follow the first objective, “Hack Laptop at Encampment”, to the encampment inside the mall. Clear out the soldiers guarding it.

Hold the HOLD TO HACK prompt on the open laptop. A text note opens, and it contains the security office code.

Check the objective, which now reads “Use Code” followed by your match’s digits and “to Unlock Mall Security.” That number is the code for your keypad.

Go down the ramp into the underground parking area. Its entrance bears the sign ENTRANCE 36. Locate the security door labeled “UNLOCKS VIA KEYPAD – LOCKED” and input the code at its keypad.

Operation Iron Citadel: Armory keypad code

The armory code is six digits long, formed from three pairs of digits. Each pair appears on a document headed “TRANSFER SLIP – DO NOT FILE”. The slips include the lines “Item: Armory access code fragment” and “Authority: Lt. Bale”. Each one identifies its part as First, Second or Third and provides the two digits for that segment.

Reach the armory doors in the Chang-san Air Base Bunker (the Operation Iron Citadel walkthrough covers the route). This starts the objective “Find the Armory Keycode”, and the keypad shows an ENTER ACCESS CODE prompt.

Check the bunker for transfer slips. One is on a desk in the medical wing, and another is on a desk in the Control Room. The remaining slips are scattered among the bunker’s rooms and offices, so split the squad to search more territory.

Watch the “Known Digits” line and the counter out of 3 on your HUD. Both update as you pick up slips. When the counter reaches 3/3, the line shows all six digits.

Return to the armory keypad. Enter the six digits in the order the HUD shows them.

The segment numbers vary between matches. Read each slip’s segment label instead of assuming which part of the code a desk holds.

Operation Grid Assault: The kill code at DBN Headquarters

Operation Grid Assault does not give you a code to read and type. You take the code from targets in two segments, compile it and then upload it. The objectives run in this order: Get the First Code Segment, Get the Second Code Segment, Compile the Code and Upload the Code.

Go to Hanex Bank and take down the target carrying the first segment. It drops the mission item “HALF OF AN ENCRYPTED HASH KEY”.

Kill Lieutenant Roze near the top of DBN Headquarters to get the second segment.

Compile the code at the laptop on floor 10.

Carry the compiled code to the rooftop antenna and upload it.

To reach the first segment by another route, ride the lift up DBN Headquarters, climb through a window onto the yellow platform used by window washers, then ASCEND the cable to the roof. Use the radio terminal at the helipad; its screen displays an ENTER ACCESS CODE keypad. Commander Deathstalker attacks as soon as you arrive, so be prepared to fight.

Helipad ENTER ACCESS CODE terminal — The helipad radio terminal on top of DBN Headquarters opens an ENTER ACCESS CODE keypad on the alternate route to the first code segment. Shown at 116:47 in Shirrako’s video. Image: Infinity Ward

A door inside Hanex Bank also shows an ENTER ACCESS CODE prompt. You do not need to open it to finish the mission.

Heavenly Luck Casino Counting Room: A keypad that needs a key

The Heavenly Luck Casino Counting Room door has a keypad and a fingerprint reader next to it, but it opens with the Counting Room Vault key. With the key, the door shows the “HEAVENLY LUCK CASINO COUNTING ROOM – UNLOCK” prompt.