Is the word 'there' correct in the following case?

[bouji]

Teachers,

I'll be at home, call me there.
I'll be at my office, call me there.
I'll be at John's, call me there.
Let's say that you're leaving a message that you will be at a certain place later on and asking someone to give you a call at that place while you are at that place, is the word 'there' proper?

I'm at home , call me there.
I'm at my office, call me there.
I'm at John's, call me there.
Similarly, you're leaving a message saying that you are at a certain place now and asking someone to give you a call at that place. Is word 'there' proper? Or should it be 'here' instead?

Thank you so much.

[Soup]

Hello bouji

I'll be at home, call me there.
I'll be at my office, call me there.
I'll be at John's, call me there.


The following are also fine:

I'm at home, call me there/at that place/at home/here.
I'm at my office, call me there/(same as above).
I'm at John's, call me there/at John's/(same as above).