To Know who blocked me on Instagram, all I need to do is to follow the steps mentioned below:
Now, go to the search tab (section).
Search for the username that you want to know has blocked you or not.
Now that you’ve searched for that person, look if you could find him/her in the search results. If you can find the user then Congrats you are not yet blocked by that person. But if you can’t find him/her in the search results then you might be in trouble as that particular person might have already blocked you.
But, sometimes not getting to see the username name in the search result may also mean that the person might have temporarily disabled their account so do consider search for that person using someone else’s account too.
The only disadvantage of this trick is that you will not be able to find out any random person who has blocked you on Instagram. This is for the people that you know and is suspicious about blocking you on Instagram.