Which door does my key open?
Type the name on the key you just picked up. Every card shows the door it opens, the building and grid square, what is inside and how to get the key, cross-checked across the launch-week guides. Tap "Show on map" to see the place on the Hajin map.
· updated …
Loading keys…
How keys work
No key? Print a Door Breacher Charge. Police station keys: where to look in the station. Story Missions that pay out a key are in the mission tracker.
How sure we are
| 2+ guides agree | At least two independent guides put this key's door in the same building. |
| One guide only | Only one guide lists it so far. Check the door name on the key card before you commit a run to it. |
| Door not found | The key exists, but no guide has filmed its door yet. The building shown is where the key card points. |
About the positions. Sources: . Opened one of these doors, or found a key we do not list? Post the key card in #data-intel on Discord and it gets credited here.
Reference: Every key as text
60 Hajin keys with the door each one opens, what is inside and how to get it.
Every key as text (60)
| Key | Grid | Place | Door | Inside | How to get it |
|---|---|---|---|---|---|
| Air Base Access Card (Multi Use) Rarity unknown | B5 | Admin Complex No. 2 server room | Used at the upgrade terminal in the Admin Complex No. 2 server room, which turns it into a single-use Armory Card. How many uses the Multi Use card has is not verified. | Not documented yet. | Linked to Operation Iron Citadel; one was seen on an office desk. |
| Air Base Armory Card (Single Use) Legendary | B5 | Chang-san Air Base bunker | Bunker armory door marked Requires Air Base Armory Access Card. Video route: About 6 minutes: walk along the perimeter wall into the base, collect the code notes in the admin building, drop into the bunker and follow the vehicle tunnel to the keypad door. The six-digit code in that run may change between matches, so piece it together yourself. | The bunker armory, where the Air Base DRC Weapons Locker also stands. | Upgrade the Air Base Access Card (Multi Use) at the terminal in the Admin Complex No. 2 server room during Operation Iron Citadel. |
| Air Base DRC Weapons Locker Ultra | B6 | Chang-san Air Base bunker | Locker in the warehouse deep inside the air base bunker, past the armory. The armory itself also needs a six-digit code pieced together from notes. Video route: The locker sits in the warehouse you drop into after opening the air base armory, but not always in the same place: if it is not where you expect, walk the warehouse a couple of times. It is a white cabinet and easy to spot. | Elite Weapons Locker: a 3-plate helmet and a weapon manual have been seen. | Found as loot |
| Bank Branch Vault Access Rare | F4 / I7 / F8 | Hanex Bank branches (Cheongun Village, NuriGO West, Songdo Wharf, two at Wolves Stadium) F4 Cheongun Village bank branch; I7 Songdo Wharf bank branch; F8 Bank branch, south Hajin | The vault in each bank branch. Put a Car Battery in the sparking panel (the reader shows READER LACKS POWER until then), use this card, then enter the four-digit code: a paper note somewhere in the same bank gives the first three digits and you guess the last. The code changes every match. | Safes and cash, sometimes gold items or a recipe (reported). | Found inside the bank it opens, often on the teller counter. |
| Blackmarket Weapons Locker Rare | C2 / B7 | Black market shops C2 Hanrim Village shop stockroom; B7 Deadtown black market (house basement) | Locker in the shop stockroom: in Hanrim Village, go behind the counter and through the green double doors. One key opens one locker. The Deadtown spot is in the second basement of a house. Video route: Deadtown spot: go in the main door of the marked house, take the stairs down on the right to the second basement level, turn left through another door, then the green double doors; the locker is behind them. | A weapon with attachments. | Recon Equipment Kit (DMZ level 46); also field loot. |
| Coin Mining Den Rare | G6 | NuriGO West apartment block | Apartment east of the westernmost NuriGO gas station. Take the south stairwell to landing 3; grey door under the Office sign, by a red fire alarm. Video route: White apartment block with shop signs: grey door with a red sign at the top of the stairwell. | Server racks and crafting parts, no weapons. | Reward from Operation Shopping Hacks. |
| Commandant Office Epic | B5 | Admin Complex No. 2, Chang-san Air Base | Second floor of Admin Complex No. 2, first door on the left under the Conference Room sign. | Rifle case, several weapon lockers, an equipment case and a supply crate. | Found as loot |
| Counting Room Vault Epic | F4 | Heavenly Luck Casino | Main floor: from the south lobby go into the east wing, through the double doors and down the corridor to the Counting Room (the door reads Heavenly Luck Casino Counting Room). The key opens both the outer and inner doors. Video route: Through the casino corridor with the gold lattice screens and a back office with a counter and desks, to a brown wooden double door. | Foot locker, weapon crate, safes, cash and a duffel. Nuclear Program Files, an Encrypted Archive and a Gold Skull have been reported, and a Zip Gun recipe in the storage room. | Reward from Operation Silent Ledger; also reported in an industrial locker at the Rice Mill and a military locker in the Haksan School Armory. |
| Executive Arms Auction Epic | G6 | DBN Headquarters, The Grid | Dark teal door on an upper floor of the tallest tower in The Grid. Which floor is not confirmed. | Weapon cases (reported, not filmed). | Found as loot |
| Field Depot Epic | B5 | Chang-san Air Base supply warehouse | Gear maintenance room on the first floor of the military supply warehouse northeast of the base clinic. Video route: In through the warehouse main door, run straight on, keep right, then turn left; the door is there. | Not documented yet. | Found as loot |
| Fire Station Storage Rarity unknown | E4 | Cheongun Village fire station | Upstairs landing of the Cheongun Village fire station. | Not documented yet. | Not documented yet. |
| Gangbyeon Apartment A Rarity unknown | G7 | Compound Echo, Hajin River Heights | Locked door of apartment block A, next to block B at Compound Echo. | Not documented yet. | Found as loot |
| Gangbyeon Apartment B Uncommon | G7 | Compound Echo, Hajin River Heights | Glass double doors of apartment block B, the one with a SAM site on the roof. Video route: One key spawn: the kitchen up the stairs from the Compound Echo underground parking, on the left. | Lockers and crates. | Often inside apartment A or the first Compound Echo building. |
| Gas Station Electrical Room Rare | H7 | Construction Zone gas station | Grey door in the basement of the south gas station, below the Hanwoori Design Complex. Video route: Take the outdoor concrete stairs down beside the gas station to a blue-grey metal door. | Not itemised yet. | Found as loot |
| Gorani's Scout Overlook Legendary | D8 | Rice Mill, Imjin Farmland | Upper landing of mill building 2. Climb the outside pipe, cross the conveyor platform and enter through the roof doorway; the stairs inside are broken, so climb the wall edges up to the landing. Video route: Climb the outside orange pipe, cross the conveyor walkway and go in to the upper landing. | Lieutenant loot room. | Dropped by the Lieutenant Gorani, not every time. |
| Gun Store Weapons Locker Rare | E4 / I6 | Gun stores in Cheongun Village and Songdo Wharf E4 Cheongun Village gun store (west side); I6 Songdo Wharf gun store (north side) | Gun store basement: past the blown-open doors to the room with three green lockers. One key opens one locker; the next locker stays locked. Video route: Cheongun Village store: in through the open shop front, take the inside stairs down and cross the basement into a yellow-green room with tall green lockers. The Songdo Wharf store is not shown. | A weapon with attachments. | Explosives Equipment Kit (DMZ level 16) and Trap Equipment Kit (level 42); also field loot. |
| Haejeok Radio Station Rare | D6 | Imjin Suburb radio mast | Broadcasting room on level 1 of the white transmitter building under Imjin Suburb's red radio mast. | Server racks and comms modules. | Found as loot |
| Hajin Art Center Rarity unknown | G6 | The Grid | Dark glass double door beside a stairwell in The Grid; the prompt reads Hajin Art Center. Video route: Go to the marked spot inside The Grid, walk forward and turn right; the door is there. | Not documented yet. | Not documented yet. |
| Haksan School Armory Rare | B7 | Haksan School, Deadtown | Tiled classroom on the second floor of the school northeast of the Re-Education Center; a red wooden door. Video route: Take the wide outdoor concrete stairs at the side of the school up to the second-floor walkway; the red wooden door with a window is on that walkway. | Weapon lockers; a medium backpack, a defibrillator and 3D printer materials have been reported. | Found as loot |
| Hanex Guard Station Epic | G6 | Hanex Bank tower, The Grid | Guard room one floor below the roof of the Hanex Bank tower (floor 17), between the two vault rooms. The vault door there is a separate code lock. Video route: Take the lift up the Hanex tower and follow the dark corridor; the security room has a glass door. | Two weapon lockers, a safe, an equipment case and high-tier weapons. | Found as loot |
| Hanwoori Art Records Room Rare | G7 | Hanwoori Design Complex, The Grid | First floor, back door on the left, reached from the south entrance of The Grid. Video route: From the south street of The Grid, into the building and down the dark ground-floor corridor; the door with blinds is at the end. | Rifle case, filing cabinets, foot lockers, computers and an equipment case. | Found as loot |
| Hazard Storehouse Rare | I5 | Haneul Nuclear Reactor | White corrugated storage shed beside the SAM site, south of the reactor island. | Up to eleven lockers with grenades, plus chemical cabinets. | Found as loot |
| Hoesik Supply Room Epic | D8 | Rice Mill, Imjin Farmland | Military supply closet upstairs in the southernmost office block outside the mill. Video route: White office block by the parked truck: take the inside stairs up to the door with the STORAGE sign. | Military supplies (not itemised yet). | Found as loot |
| Hospital Chemistry Lab Rarity unknown | F5 | Mirae General Hospital | White door at the top of an inside stairwell of the hospital. Video route: Go to the hospital building with the scaffolding, through the side courtyard and inside, then up the stairs to the white door. | Not documented yet. | Not documented yet. |
| Hotel Lucera Lobby Rarity unknown | H7 | Hotel Lucera, next to the Hanex tower | Glass street door into the hotel lobby. | Lobby contents only. | Found as loot |
| Imjin Mill Foreman's Office Rare | D8 | Rice Mill, Imjin Farmland | First floor of the main mill building. Video route: In through the big open bay door of the mill warehouse, up the inside metal stairs and along the wooden upper corridor to the office. | Not itemised yet. | One was taken from a defeated player. |
| Iskra's Control Room Legendary | F7 | Cheonwang Peak Array | Top floor of the transmitter (broadcast) building. Video route: Into the transmitter building and up the stairwell to the top floor; the door is wooden. | Lieutenant crate with Iskra's weapon. | Dropped by the Lieutenant Iskra. |
| Jang-ui's Converted Power Room Legendary | H6 | NuriGO Mall | Generator room on the lowest floor of the mall, by the robodog course. Video route: The entrance is an outdoor ramp down beside the mall into the lower level; follow the dark corridors to the power room. | Two weapon lockers, a loot chest and a Lieutenant crate. | Dropped by the Lieutenant Jang-ui. |
| Jin-Tae's Private Lounge Legendary | F4 | Heavenly Luck Casino penthouse | Penthouse: start the generator in the parking garage, take the lobby lift up, go left, along the passage, then right. Video route: Another way in: in at the main entrance, straight on, left, then up the stairs to the top floor (7) and on to a wooden door with an ornate lattice glass panel. No generator or lift needed in this run. | Lieutenant crate with two legendary weapons, and two lockers. | Dropped by the Lieutenant Jin-Tae. |
| Kang's Arms Incinerator Rarity unknown | B3 | The Citadel, 14th Political Prison | A room inside The Citadel whose door reads Kang's Arms Incinerator. The guides do not give the floor yet. | Not documented yet. | Said to drop from the Lieutenant The Warden; not seen in the guide authors' own runs. |
| Lucera Suite 703 Bedroom Epic | H7 | Hotel Lucera | Bedroom of suite 703 on the top apartment floors. The suite is open; only the bedroom is locked. Video route: Main door, lift at the back of the lobby, then a second lift further up. Through the door, second turning on the right is suite 703. Two heavy-armour soldiers wait inside, one in front and one in the bathroom. | Rifle case, supply crate and weapon lockers. | Found as loot |
| Mechanic's Shack Rare | F5 | Cheongun Village | Single-door shed directly south of the Cheongun Village clinic. Video route: White metal single door of a small shed between red brick walls. | Footlockers, a rifle case, an armor box, a tool chest and military lockers; a KG-7 Vulcan, a Power Regulator, a medium backpack and level 2 plates have been reported. | One was reported in a green locker on a moving train. |
| Militia Arms Depot Rare | G7 | Gangbyeon Apartment B, Hajin River Heights | Armory in Gangbyeon Apartment B. The guides say the bottom floor; a player video shows it on the second floor. Video route: Go into the underground parking, take the stairs up and turn left into the kitchen to find the Gangbyeon Apartment B key. Open Apartment B, then go up to the second floor: the armory is behind a white door in a teal and white corridor. | Not itemised yet. | One was found in a duffel bag in The Citadel East Wing. |
| Mill Explosives Lab Uncommon | D8 | Rice Mill, Imjin Farmland | Door not confirmed yet. Guides report getting in through the roof or a window of the mill. The key has been seen on a desk in the mill control room. | Not documented yet. | Found as loot |
| Mirae Electrical Room Rare | F5 | Mirae General Hospital | Level B2 of the northwest garage. Enter from the ring road under the half-closed roller door with the P sign, go down to the lowest level and through the back double doors. Video route: Blue-grey door in the hospital's underground garage. | Tool chests, military bags, armor boxes and a medium weapon backpack; Electronic Sensors, an Encrypted Archive, armor plates and Electronics have been reported. | Reward from Operation Critical Extraction; also field loot. |
| Netshin IT Room Epic | G6 | Netshin Tech Complex, The Grid | Floor 14 of the Netshin Tech Complex, at the top of the stairs behind the server hall. Video route: Take the lift up the Netshin building, leave into the glass hall, climb the stairs and walk through the blue-lit server hall to the IT room door. | A weapons locker and server blades. | One was found in an apartment locker. |
| Old Barber Shop Rare | I7 | Songdo Wharf, south side | South side of the wharf, to the right of the crab stall. | Weapon cases and armor boxes (reported). | Found as loot |
| Police Station Armory Uncommon | D2 / C4 / F4 / H5 / G7 | Every police station D2 Revolution Dam police station; C4 Pyeonghwa Village police station; F4 Cheongun Village police station; H5 Hajin City police station; G7 Wolves Stadium police station | Barred armory door on the ground floor (in Pyeonghwa Village, the basement) of a police station. | Military gear and a weapon. | Spawns inside the same station. Activision's notes list a Police Station key in the Recon Equipment Kit (DMZ level 19). |
| Police Weapon Depository Epic | G7 | Wolves Stadium | White garage with a green roller door next to the Wolves Stadium police station (its auxiliary armory, to the north). Video route: Past the police station, along its side wall to the white garage with the green roller door. | Epic weapons (reported). | Found as loot |
| Prison Encampment Storage Rare | C3 | 14th Political Prison camp | Ordnance storage on the southeast side of the prison camp. Video route: The door is a weathered wooden plank door on a corrugated metal shed at the edge of the camp, by the trees and the wooden fence. | Not documented yet. | Found as loot |
| Rail Depot Storage Rare | E5 | Cheongun Village train depot | Basement of the far-western train depot beside the fire station; take the stairs down. Video route: Enter the white and blue train station through its glass ENTRANCE front, cross the ticket hall with the lockers, take the stairs down and follow the underground passage to a dark green metal door. | Five lockers, crates, footlockers, a rifle case, luggage and cash (reported). | Found as loot |
| Re-Education Center Annex Epic | B7 | Re-Education Center, Deadtown | Ground-floor annex. Enter at the south corner and follow the wall to the left. | A 2-Plate Ballistic Gel Vest recipe in a weapons locker, and a legendary Oden, have been seen on video. | Found as loot |
| Reactor 02 Control Room Rare | H4 | Haneul Nuclear Reactor, Reactor 02 | Grey single door with dark panels on the upper inner catwalk of Reactor 02. Video route: Same start as the purification run: drop down into Reactor 02, clear the small room (two enemies), turn left past the pool and take the stairs up to the control room. Radiation fog; bring protection. | Not itemised yet. | Found as loot |
| Reactor DRC Locker Ultra | H4 | Haneul Nuclear Reactor, Reactor 02 | Underwater locker in the irradiated pool of Reactor 02 (the western pool). Bring a hazmat suit or gas masks. Video route: Drop down into Reactor 02 and clear the small room, then turn left straight into the water; the locker is underwater. | Elite Weapons Locker: a weapon manual, an Epic weapon and a 3-plate vest have been seen. | Reward from Operation Fallen Ember. |
| Rice Mill Bunker Rarity unknown | D8 | Rice Mill, Imjin Farmland | Rice Mill bunker door, beside the silos. Video route: The door is dark green, at the top of the outside concrete stairs of the mill building beside the silos, through a short corridor. | Not documented yet. | Not documented yet. |
| Roze's Highrise Armory Legendary | G6 | Netshin Tech Complex, The Grid | Teal door on the east side of floor 14, reached through the main entrance, the lift shaft and the balcony. Expect robodogs and turrets. Video route: Recommended with the Network Assault contract and a full squad. From the DBN HQ side, clear the guards at the door, turn right to the lift shaft (skip the zipline), climb the long yellow stairwell to the top, turn right at the end; the door is on your right. | Lieutenant crate and two weapon lockers. | Reward from Operation Grid Assault; also dropped by the Lieutenant Roze. |
| Shop Records Room Rare | F7 | Goh24 supermart, Wolves Stadium | Above the Goh24 supermart: climb the green outside stairs to the frosted glass door at the top. Video route: Two-storey shop with the green awning: up the stairs to the frosted white door with a red fire-hose box beside it. | A duffel with documents, and lockers (reported). | One was found in a military bag at Compound Charlie. |
| Shopping DRC Locker Ultra | H6 | NuriGO Mall lower garage | Behind a second locked door in the DRC lab of the lower garage, off the Shopping Hacks lab. That door needs blue robodog cores first: the guides say 8 to 10, a player video shows 6 slots. Video route: In this run the panel had 6 robodog core slots, then the deep lab opened and the inner room with the lockers was reachable. | Elite Weapons Locker (contents not itemised yet). | Found as loot |
| South Block Armory Legendary | B3 | The Citadel, 14th Political Prison | Inner armory of The Citadel's South Block: leave the front, pass the ammunition supply and climb in through the nearby window to reach the locked door. | Not documented yet. | On the counter inside The Citadel Main Control Room. Seen in one filmed run; not guaranteed every match. |
| Supreme Leader's Bunker Access Card Legendary | B6 | Chang-san Air Base bunker, behind Admin Complex No. 2 | Big grey blast door at the bottom of the bunker, reached from stairwell 02 of Admin Complex No. 2 through white blast doors, a long crawl and more stairs. It is an access card, not a key. Video route: Another way in: past the watchtower to the building, through the gap in the hedge, in at the front entrance with columns, across the red-carpet lobby, through the wooden door and down the stairs to the grey blast door with the red star. | The Supreme Leader's rooms with a Lieutenant crate; a legendary LMG has been seen. | Reward from Operation Iron Citadel. |
| The Chemist's Secure Armory Legendary | I4 | Haneul Nuclear Reactor, northeast bunker | The right-hand of two bunker doors by the northeast boathouse. Video route: White bunker door near the northeast shore of the reactor island. | Rifle case, a crate and two weapon lockers. | Dropped by the Lieutenant The Chemist; also reported as random loot. |
| The Citadel Main Control Room Uncommon | B3 | The Citadel, 14th Political Prison | Door beside the Officers Only sign in The Citadel. Inside, the South Block Armory key lies on the long counter by the radios and telephones. | The South Block Armory key, plus radio equipment and loose loot. | Feed four K9 Battery Cores into the four-slot K9 Core Terminal in the East Wing dog area; the key sits on the desk in the room it opens. |
| The Citadel Secondary Control Room Uncommon | B3 | The Citadel, 14th Political Prison | Security station on the landing marked floor 2 in the middle of The Citadel. Switch the camera views there to open two fences. | Fence controls rather than loot. | In a side room of the South Wing next to two monitors, after you pull the lever and press the cell-control button. |
| The Citadel South Wing Uncommon | B3 | The Citadel, 14th Political Prison | Exterior door on the southwest arm of The Citadel. The cells inside need a separate keypad code split across two notes. | The cell block. | Found as loot |
| The Doctor's Command Office Legendary | F5 | Mirae General Hospital, floor 7 | Floor 7, the office row 701 to 712: light wooden double doors. Video route: Take the hospital lift up; on the office floor the door is a light wooden double door. | Lieutenant crate; a Tempered Armor Vest recipe has been seen in it. | Dropped by the Lieutenant The Doctor (not every time). |
| Underground Equipment Storage Rarity unknown | B7 | Re-Education Center underground | From the main entrance of the Re-Education Center turn left to the last room and take the stairs down. Go straight, turn left at the junction (door on the right), then follow the hall to the end: the storage room is on the left. | Not documented yet. | Random loot; containers inside the Re-Education Center and on the moving train are named. |
| Underground Propaganda Store Room Rare | B7 | Re-Education Center basement | In the underground cells below the Re-Education Center, off a dark side passage of the main underground route. Said to be a blue door; the exact door is not confirmed. | Not documented yet. | Found as loot |
| Utility Maintenance Storage Rare | H4 | Haneul Nuclear Reactor transformer yard | Maintenance room under the transformer yard, southwest of Reactor 01. Video route: Drive through the rail tunnel into the yard west of the reactor, go into the underground entrance with the red warning light and follow the dark corridor. Bring a gas mask. | Lockers and crates. | Found as loot |
| Vault Armory Epic | F4 | Heavenly Luck Casino underground parking | Mesh-door armory in the casino's underground parking: enter from the north, go right and down through the garage doors to the room at the foot of the northwest stairs. The big vault gate in the parking cannot be opened with keys. Video route: Another way in: through the HEAVENLY LUCK main entrance and the lobby (red sofas, display car), into the main hall, down the side stairwell to the parking, then across it to the mesh door. | Armor box, weapon case, two weapon lockers and medical loot; a weapon manual and Nuclear Program Files have been reported. | One was reported in a duffel at Songdo Wharf. |
| Weapons Mod Workshop Rare | B5 | Chang-san Air Base repair garage | Second floor of the military repair garage west of the base clinic. | Not documented yet. | Found as loot |
- Keys appear to be single use: no use counter shows on the card and keys used so far disappeared after opening. A Gun Store key opens one locker, not the whole store.
- Read the grid square on the key card, then look for the door with the matching name. Without the key the door says LOCKED; with it the prompt changes to UNLOCK and opening it pays about 300 XP.
- Keys sit in your backpack or secure slot. Guides suggest the secure slot keeps a valuable key if you die, but that is not confirmed.
- Keys from Story Missions land in your stash after the extraction summary.
- No key? A Door Breacher Charge opens any locked door once. It can be printed, and the Vendor sells it when in stock.
- The Keep Out order needs any Legendary Lieutenant key: there is no separate item called Lieutenant's Key.
Data updated 2026-10-30. Sources: Community COD Central — MW4 DMZ keys · Community DMZ Codex — keys and loot rooms · Guide AllThings.How — which door each key opens · Community mw4map.com — key locations · Community dmzmap.com — key locations and locked rooms · Guide The Based Otaku — Underground Equipment Storage key · Community 哆啦A东_DMZ无人区 — key room spots and routes (Bilibili video series) · Guide GamerFuzion — five bank vaults, keycards and codes · Community DMZ Codex — Bank Branch Vault Access