This guide will walk you through the steps to activate a device on Netflix. Some devices require activation before you can log in, particularly when using new devices or devices that have recently received software updates.
Steps to Follow

Visit the page https://www.netflix.com/activate
from a web browser. You can use any browser on a computer or Mac to access the site.

Log in to Netflix. Use your registered email address and password to access your Netflix account.

Enter the activation code. The device you need to activate will display an activation code. Enter this code into the "Enter code" field on the Netflix website.

Click the blue Activate button below the activation code entry field. This will activate Netflix on your device.