I have not spoken to my brother for about 28 years

Approximately 3 years ago I decided to try and track him down.
I found who I think is my brother, both initials and a rare spelling of our surname.
Phone number and address.
I am assuming it is him. In the intervening 3 years I made no attempt to contact him.
This morning I have drafted a letter and will write it tonight and post it tomorrow.
I would rather do it this way instead of ringing.
I gave him my email address.
I wonder if he is still at that address?