I block my Ex during NC?

It is okay that I block my ex boyfriend on Whatsapp during my No contact mode? The reason I have to do this :
1) I keep checking my Whatsapp to see if he message me
2) I keep looking at his Whatsapp status or profile picture
It's a challenge for me. I am now on Day 2 on NC and I might unblock him on Day 30
I block my Ex during NC?
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