WhatsApp is a messaging app with over 1 billion active users. It’s one of the most popular messaging apps in the world, and it’s also one of the most secure. That’s because WhatsApp encrypts all your messages with a secret key. To check if your WhatsApp number is registered on the app, you can go to https://www.whatsapp.com/account/. On this page, you’ll see a list of your registered numbers and their corresponding account names. If you don’t see your number on this list, it means that it isn’t registered on the app yet. If you do see your number listed on this page, but you don’t have an account name associated with it, that means someone else already has that account name and they can’t access your messages. To create an account on WhatsApp, go to https://www.whatsapp.com/account/. Once you have an account name, enter that into the “Account” field on https://www.whatsapp.com/account/. Then click “Create Account.” ..