No Profile Picture or Status Updates If you can’t see the contact’s profile picture or status updates, they may have blocked you. However, this isn’t always a definitive sign, as they might have changed their privacy settings.
No “Last Seen” Information If you can’t see when the contact was last online, it could indicate that you’ve been blocked. Again, this can also be due to privacy settings.
Messages Sent but Not Delivered While considering how to know you are blocked on WhatsApp, when you send a message to a blocked contact, it will only have one gray tick (message sent) but won’t have the second gray tick (message delivered).
Calls Don’t Go Through If your calls to this contact never seem to go through and you don’t hear the phone ringing, it might mean they’ve blocked you.
Mutual Contact Check If you have a mutual friend or contact who is also friends with the person in question, ask them to check if they can see the suspected blocker’s profile picture, status, or last seen information.
No Blue Ticks If your messages used to have blue ticks (indicating that they were read) and now they only have gray ticks (indicating they were sent but not read), it’s a sign you might be blocked.