First of all, Open the Whatsapp app and go to your WhatsApp profile options.
Then, Select the three dots which is present at the top right corner and choose the options of Settings.
After that, scroll down until you see the options Privacy and tap on that options.
Now under the Section of Privacy, choose the option of Blocked contacts.
At last, you will see the list of blocked contacts in your Whatsapp account.
Read more here:- https://worldzo.net/how-to-know-if-some … -whatsapp/