How do I know if Someone blocked my number?

You can use True Caller to find out who blocked your number.

• First of all, Open True Caller and tap on the grey search bar at the top of your screen.
• Then, Enter the number you want to block and tap on “Check”.
• After that,  If someone blocked your number, it will show up as “blocked” with a little icon beside it.

Read more here:- https://worldzo.net/how-to-know-if-someone-blocked-your-number/