What you call your father depends on your relationship with him.
According to a reference from December 5th, 2023, here's a breakdown:
- If you are talking to him, you can call him by his first name.
- If you have a good relationship with him, call him Dad.
- If you have a step-father you are also close to you can call him Dad too, or if you want to distinguish the two your step-father can be called “Bonus Dad” or another fun name you both like.