Updated October 23, 2026
Finding Comms Modules in Call of Duty: Modern Warfare 4 DMZ can be frustrating, especially when you need five to unlock Uncommon Ingredient Printing. You can search an entire server room, collect CPUs, Electronic Sensors and other valuable components, and still leave without a single Comms Module.
The key is knowing which buildings contain suitable electronic loot, how to reach the server rooms, and which alternative locations are worth checking when a run produces nothing.
This guide covers the best Comms Module farming locations in Deadtown, Cheonwang Peak Array and Netshin Tech Complex, along with crashed-drone loot, solo farming tips, crafting recipes and upgrade requirements.
π Table of Contents
- Quick Answer: Where to Find Comms Modules
- Best Comms Module Farming Locations
- Deadtown: Best Solo Farming Route
- Cheonwang Peak Array: Data Farm Route
- Netshin Tech Complex: High-Risk Alternative
- Can Crashed Drones Drop Comms Modules?
- Why Aren't Comms Modules Dropping?
- How to Craft Comms Modules
- What Are Comms Modules Used For?
- Best Solo Farming Strategy
- Frequently Asked Questions
- Final Tips
Quick Answer: Where to Find Comms Modules in MW4 DMZ
You can find Comms Modules in computer and server-related loot containers at several locations in MW4 DMZ:
- Deadtown: Search the upper-floor computer rooms in the hillside facade buildings, including the row of light-blue buildings.
- Cheonwang Peak Array: Enter the communications facility, reach the second-floor Data Farm and search its server rooms.
- Netshin Tech Complex: Search the computers and servers around The Grid, but expect tougher enemies.
- Crashed drones: Check the accessible loot panels on guarded, already-downed drones encountered during Side Ops.
For solo players, Deadtown is a good starting location because you can concentrate on a group of computer rooms without committing to a prolonged fight inside a major technical complex.
Cheonwang Peak Array is another strong option, particularly when you also need CPUs, Electronic Sensors and other crafting ingredients.
Important: Comms Modules are Epic ingredients with variable loot availability. They are not guaranteed to appear in every computer, server blade or crashed drone.
Best Comms Module Farming Locations
Not every farming location is equally suitable for every operator.
- Playing solo? Start with Deadtown's upstairs computer rooms.
- Want several electronic containers in one building? Visit Cheonwang Peak Array's Data Farm.
- Already well-equipped? Consider Netshin Tech Complex and its server infrastructure.
- Encountered a guarded crashed drone? Check its loot panel for another possible Comms Module.
The best route is the one that lets you search multiple relevant containers while keeping your equipment and extracted ingredients safe.
Deadtown: Best Solo Comms Module Farming Route
Deadtown is one of the most practical places to begin searching for Comms Modules, especially if you have struggled with the enemies at Cheonwang Peak Array.
The area to focus on is the hillside facade buildings, particularly the row of light-blue buildings containing upstairs computer rooms.
You do not need to search every ordinary container throughout Deadtown. Prioritize the rooms containing computer equipment.
How to farm Comms Modules in Deadtown
- Travel to Deadtown and locate the hillside facade buildings.
- Look for the row of light-blue buildings.
- Enter an accessible building and head toward its upper floors.
- Search the computer rooms and available electronic loot containers.
- Move to another nearby building if the first one has no Comms Modules.
- Check your inventory and decide whether to continue or extract.
The main advantage of Deadtown is the ability to concentrate on several computer rooms within a recognizable area.
However, it is not a guaranteed or risk-free farming route. Other operators and hostile enemies can still interrupt your search.
What if you find nothing in the first building?
Try the other upstairs computer rooms in the same group of buildings.
A computer room producing ordinary electronic materials does not mean Comms Modules cannot appear there. Loot can vary between searches and deployments.
If you have checked several suitable rooms without success, consider switching to Cheonwang Peak Array or extracting with the valuable ingredients you have already collected.
Cheonwang Peak Array: Data Farm Server Room Route
Cheonwang Peak Array is another useful Comms Module farming location because its communications facility contains numerous searchable server racks.
The main landmark is the Data Farm, marked by the Korean sign λ°μ΄ν° ν.
This location is particularly useful when you want Comms Modules while also collecting CPUs, Control Units, Printed Circuit Boards and Electronic Sensors.
Step 1: Enter Cheonwang Peak Array
Travel to Cheonwang Peak Array and approach the main communications facility.
Enter the compound and move through the interior corridors. Be prepared for enemies around the entrance and inside the building.
Before going upstairs, check that you have enough backpack space to carry valuable crafting ingredients.
Step 2: Find the staircase to the second floor
Inside the communications building, locate the main concrete staircase.
Look for the floor indicator marked 2μΈ΅, which means second floor.
Climb the stairs and continue through the upper corridors toward the server-room section.
You may pass office doors, security areas and additional stairwells along the way.
Step 3: Locate the Data Farm entrance
Look for the doorway marked λ°μ΄ν° ν (Data Farm).
This is the main landmark for the server-room search.
Inside the Data Farm and surrounding technical rooms, you will find rows of tall server racks with searchable containers.
Prioritize these racks rather than spending most of your time opening unrelated supply containers.
Step 4: Search the SERVER BLADE containers
Move through the server aisles and interact with containers labeled SERVER BLADE.
These containers can hold several useful electronic ingredients, including:
- CPUs
- Control Units
- Electronic Sensors
- Printed Circuit Boards
- Detonators
- Electronics and other basic crafting resources
The Array's computers and servers are Comms Module farming sources, but individual containers can produce different loot.
If one server blade contains a CPU or Printed Circuit Board instead of a Comms Module, continue checking the other accessible racks.
Do not expect every server blade to contain the same ingredients.
Step 5: Check nearby offices and additional server racks
After searching the main Data Farm aisles, inspect accessible adjoining rooms.
Office shelves and IT Bags can contain additional technical ingredients. These are useful secondary pickups, although they should not be treated as guaranteed Comms Module sources.
If your backpack is becoming full, review the items you are carrying before opening more containers.
For additional inventory tips, see our MW4 DMZ Backpack Full guide.
Step 6: Extract with your valuable loot
Once you have checked the available server containers, decide whether continuing the search is worth the risk.
Even if you do not find Comms Modules, you may have collected CPUs, Electronic Sensors, Control Units and other ingredients needed for printing or station upgrades.
Leaving with useful materials is often better than losing your equipment while searching indefinitely for a rare item.
Is Cheonwang Peak Array better than Deadtown?
Cheonwang Peak Array is a strong choice when you want to search multiple server containers in one facility.
Deadtown may be preferable when you are playing solo and want to avoid prolonged combat inside a heavily defended technical location.
Neither area guarantees Comms Modules on every deployment.
Netshin Tech Complex: High-Risk Alternative
Netshin Tech Complex is another location where Comms Modules can appear in computer and server-related loot.
The relevant area is The Grid, which contains technical infrastructure worth searching.
However, this is not the best first destination for an under-equipped solo operator.
The complex has an Extreme threat rating, and Lieutenant Jang-Ui adds another significant danger to the area.
Consider searching Netshin Tech Complex when:
- You have suitable weapons, armor and healing supplies.
- You are comfortable fighting tougher enemies.
- Your squad is already completing another objective nearby.
- You want several types of valuable electronic ingredients in one deployment.
If you only need one or two more Comms Modules, try the Deadtown and Cheonwang Peak Array routes before taking unnecessary risks at Netshin.
Can Crashed Drones Drop Comms Modules?
Guarded crashed drones are another possible Comms Module source.
These are already-downed drones found in the environment, not the smaller flying drones that you shoot down.
They can appear in different places between deployments and may be associated with nearby Side Op activity.
How to loot a crashed drone
- Watch for a Side Op notification as you travel through the map.
- Look for an already-crashed drone with enemies guarding it.
- Clear the immediate threat.
- Approach the wreckage and locate its accessible loot panel.
- Open the panel and check for Comms Modules or other crafting ingredients.
The contents can vary. Some drones may contain ordinary loot instead of Comms Modules.
Because these encounters are not fixed, it is better to treat crashed drones as additional opportunities during your deployment rather than relying on them as a guaranteed farming route.
Why Aren't Comms Modules Dropping?
If you have searched several rooms without finding a Comms Module, there are a few things worth checking before abandoning your farming plan.
1. You're searching the wrong types of containers
At Cheonwang Peak Array, focus on computers and server-related containers.
Duffel bags, medical cabinets and armor boxes can provide useful supplies, but the main reason to visit the Data Farm is its electronic equipment.
2. You're checking only one server rack
The Array contains several searchable server blades.
An unsuccessful search in one rack does not determine what the others will contain.
Check the accessible server aisles before leaving the area.
3. You're expecting guaranteed drops
Comms Modules are Epic ingredients, and there is no established guarantee that a particular computer or server blade will contain one.
A location can produce useful electronic ingredients without giving you the exact item you need.
4. You're staying too long in a dangerous area
If enemies are becoming difficult to manage or your healing supplies are running low, continuing the search may not be worthwhile.
Consider extracting with your existing loot and trying another location on your next deployment.
5. Your backpack is already full
A full backpack makes it harder to collect additional ingredients without discarding something.
Before entering a server room, leave enough space for valuable loot and avoid filling every slot with low-priority materials.
6. You're overlooking alternative sources
If Cheonwang Peak Array repeatedly produces no Comms Modules, try Deadtown's upstairs computer rooms.
Also check guarded crashed drones when you encounter them.
Changing locations can give you additional loot opportunities without forcing another lengthy search of the same facility.
How to Craft Comms Modules in MW4 DMZ
You can print Comms Modules at the 3D Printer after unlocking Epic Ingredient Printing.
This is a useful later-game option, but it requires a substantial investment in cash and crafting materials.
Comms Module printing recipe
To print one Comms Module, you need:
| Material | Amount |
|---|---|
| Electronics | 100 |
| CPUs | 3 |
You must unlock Epic Ingredient Printing before the Comms Module recipe becomes available.
How to unlock Epic Ingredient Printing
The upgrade requires:
- $100,000 DMZ Cash
- 10 Binding Catalysts
- 10 Printed Circuit Boards
- 5 Military Composites
Once the upgrade is unlocked, you can turn the required Electronics and CPUs into Comms Modules at the 3D Printer.
Should you farm or craft Comms Modules?
If you already have Epic Ingredient Printing, crafting can be a convenient alternative to searching for rare loot.
However, if you are still working toward your first printing upgrades, collecting Comms Modules from the world may be more practical.
The Cheonwang Peak Array server rooms are useful in either case because they can provide CPUs and Electronics alongside other technical ingredients.
For another useful crafting recipe, see our MW4 DMZ Smelling Salts guide.
What Are Comms Modules Used For?
Comms Modules are Epic 3D Printer Ingredients used for important station upgrades and advanced equipment.
Their item description identifies them as crafting ingredients for the Advanced UAV and Fulton Drop Marker.
They are also required for Uncommon Ingredient Printing and Stash Weapon Upgrade I.
Uncommon Ingredient Printing
This upgrade requires:
- $50,000 DMZ Cash
- 20 Biomaterials
- 10 High-Tenacity Fibers
- 5 Comms Modules
Uncommon Ingredient Printing unlocks the ability to print several Uncommon ingredients from basic resources.
Stash Weapon Upgrade I
This upgrade requires:
- $50,000 DMZ Cash
- 20 Reactive Metals
- 10 Stock Rods
- 5 Comms Modules
Advanced UAV
The Advanced UAV recipe requires:
- 2 Comms Modules
- 3 Nitro Compounds
- 5 Electronic Sensors
Fulton Drop Marker
The Fulton Drop Marker recipe requires:
- 3 Comms Modules
- 1 Prototype RF Module
- 5 Control Units
Should you sell Comms Modules?
Usually, it is better to keep them until you have completed the upgrades and equipment recipes you need.
A stack of four Comms Modules has a displayed sell value of $6,000, but replacing those ingredients may take several searches.
Selling spare modules makes more sense after your important upgrades are complete.
Best Solo Comms Module Farming Strategy
If you are trying to collect five Comms Modules for Uncommon Ingredient Printing, prioritize a route that offers several loot opportunities without forcing unnecessary fights.
Recommended solo farming plan
Start with Deadtown. Search the upstairs computer rooms in the hillside facade buildings. This is a practical first option when you want to avoid heavily defended technical facilities.
Move to Cheonwang Peak Array when appropriate. Enter the communications building, climb to the second floor and search the Data Farm's available server blades.
Check crashed drones along the way. If you encounter a guarded drone wreckage, inspect its loot panel for another chance at Comms Modules.
Save Netshin Tech Complex for stronger deployments. The Grid is worth considering when you are equipped for tougher combat or already have a reason to visit the area.
Extract with valuable ingredients. Do not turn every unsuccessful Comms Module search into a lost deployment. CPUs, Control Units, Electronic Sensors and Printed Circuit Boards are still useful.
If you are deciding how much to spend before deploying, our MW4 DMZ Infiltration Costs guide explains the available options and whether the $100K Cargo Plane is worth using.
Which location should you try first?
For most solo operators who simply want Comms Modules, Deadtown is the best starting point to consider, with Cheonwang Peak Array as the next option.
If you are comfortable clearing the Array, its multiple server containers make it a useful location for broader electronic ingredient farming.
The goal is not to force a Comms Module drop from one container. It is to search suitable locations efficiently, collect useful materials and extract safely.
Frequently Asked Questions
Where is the best place to find Comms Modules in MW4 DMZ?
Deadtown's upstairs computer rooms and Cheonwang Peak Array's second-floor Data Farm are two useful locations. Deadtown is a practical starting option for solo players, while the Array offers several searchable server containers in one facility.
Can you farm Comms Modules solo?
Yes. You can search Deadtown's computer rooms and Cheonwang Peak Array without a full squad. However, enemy encounters and other operators can make some deployments dangerous, so choose your route based on your equipment and experience.
Do Comms Modules spawn in every server blade?
No. Comms Modules are not guaranteed in every server blade. These containers can also contain CPUs, Control Units, Electronic Sensors, Printed Circuit Boards and other crafting materials.
Where are the Cheonwang Peak Array server rooms?
Enter the communications facility and locate the main staircase. Climb to the second floor, marked by 2μΈ΅, and find the Data Farm entrance labeled λ°μ΄ν° ν. Search the server-blade containers in the surrounding rooms.
Can crashed drones contain Comms Modules?
Guarded, already-crashed drones are another possible source. Look for a nearby Side Op notification and an accessible loot panel on the wreckage. Their locations and contents can vary.
How many Comms Modules do you need for Uncommon Ingredient Printing?
You need five Comms Modules, along with $50,000 DMZ Cash, 20 Biomaterials and 10 High-Tenacity Fibers.
Can you craft Comms Modules instead of finding them?
Yes. After unlocking Epic Ingredient Printing, you can print one Comms Module using 100 Electronics and three CPUs.
What should you do if Cheonwang Peak Array has no Comms Modules?
Search the remaining accessible server blades, then consider Deadtown's upstairs computer rooms or a guarded crashed drone. Keep any valuable electronic ingredients you have already collected, and extract if the remaining search becomes too risky.
Final Tips
Comms Module farming in MW4 DMZ is easier when you focus on computer rooms and server-related containers rather than searching every loot box you encounter.
Deadtown is a practical solo starting point, while Cheonwang Peak Array's second-floor Data Farm offers a concentrated server-room route. Netshin Tech Complex and crashed drones provide additional opportunities when your deployment takes you nearby.
If a run produces CPUs, Electronic Sensors or Printed Circuit Boards instead of Comms Modules, you can still leave with valuable crafting materials.
Prioritize efficient searches and successful extraction over repeatedly risking your equipment for an item that is not guaranteed to appear.
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