Yes you can, for many years after started receiving messages from one wise spirit every night I thanks God for giving me the abiity of being able to communicate with the spirits of my love ones that are not longer with us in this physical life.
I communicate with both of my parents couple uncles once and with two of my grandfathers.
I have been told that some of them are in another level and it is not possible to call them all the time.
Have faith and you will be able to do it.