So he just blocked your calls, texts, and perhaps even your email. You may or may not be aware of the reason why he blocked you in the first place.
If blocking you was done during or after a heated argument, then there are chances that he will eventually unblock you.
If he blocked you to give himself a breather. He feels the necessity to block other people temporarily to give themselves some alone time.
If he made an excuse on purpose just so he could block you, there are high chances that his ultimate plan is to end the relationship for good.
Or if the relationship has turned too abusive and toxic to mend.