How to find out if someone is blocked on WhatsApp?

If someone wants to know if he has been blocked by anyone on WhatsApp, then the app does not give any such permission to its users.

However, some clues can tell users that whether someone has blocked them on WhatsApp or not.

If someone blocks anyone on WhatsApp, the respective person will not be able to check their online or last seen status.

Likewise, users will not able to see the profile picture of that person after being blocked.

A message can be sent to a blocked person on WhatsApp but if someone has been blocked, then the status of the sent message will be a single tick instead of a double tick after being blocked.

Whereas, one can also find out that if he/she has been blocked by voice and video calls because a user will not be able to make calls to after being blocked by any person.