Finding Your Computer's Serial Number

You can find your computer serial number by examining the external case or by locating it inside the operating system.

Finding the Serial Number on the Computer Case

Most computers have their serial numbers on the outside of the case or, in the case of some laptops, underneath the battery. This is the quickest way to find your serial number.

Mac

The serial number on a Mac laptop will be found on either the bottom of the case or inside the battery bay (for laptops older than 2009). It's inscribed at the end of the copyright data and above the regulatory warnings. A Mac serial number is an 11- or 12-character (depending model and year) alphanumeric code.

Dell

A Dell's serial number is called a service tag. It will be found on a sticker on the top, back, or side of your system, or underneath the battery on some laptops. A Dell service tag is a 7-character, alphanumeric code (ex: 4F34DG1).

Lenovo

The serial number on a Lenovo laptop will be found on the bottom of the laptop or under the battery. It is a 7-character, hyphenated, alphanumeric code (ex:12-12AB3).

Finding the Serial Number in the Operating System

If you've removed the sticker from the outside of your computer, or it's no longer legible, you can also find your serial number in the computer's operating system.

Mac

Finding your serial number in OS X Yosemite (10.10):

  1. Select the Apple Menu in the upper left hand corner of the Menu Bar.
  2. Select About this Mac.
  3. The serial number is displayed above the System Report button.

Finding your serial number in OS X Mavericks (10.9) or earlier:

  1. Select the Apple Menu in the upper left hand corner of the Menu Bar.
  2. Select About this Mac.
  3. Double click the version number to reveal the serial number.

Windows

  1. Press Win + R (open Run.)
  2. Enter "cmd" and select OK.
  3. Enter "wmic bios get serialnumber" into the command line window that appears.

Further Resources

Contact the Helpdesk for additional assistance.