Symptoms
Locate your computer's service tag (also referred to as the serial number) using Command Prompt.
Cause
Using the Command Prompt to locate your Dell computer service tag.
Resolution
Laptops and Desktops
- Type cmd in the Windows search bar at the bottom-left of the screen, then select Command Prompt from the list of results.
- In the Command Prompt window, type wmic bios get serialnumber and press Enter.
- The Service Tag (Serial Number) appears as shown in the image below.

Tablets
- On the Windows Tile Screen, swipe up from the bottom and tap All Apps.
- Scroll to the right until you get to Command Prompt.
- In the Command Prompt window, use the on-screen keyboard to type wmic bios get serialnumber and press Enter.
- The Service Tag (Serial Number) appears as shown in the image below.

Additional References
Follow the link below for additional instructions on how to find your Dell Service Tag depending on the Dell computer or product you own:
Out of warranty? No problem. Browse to the Dell.com/support website and enter your Dell Service Tag and view our offers.
NOTE: Offers are only available for US, Canada, UK, France, Germany, China, and Japan personal computer customers. Server and Storage not applicable.