I always (for this) get the advantage that most marker parsers allow a dedicated subset of html. Including tag <br>
So yours will be:
First Lastname <br> Some Company <br> 2041 Smile Rd <br> New York, NY <br> (999) 999-8888 <br>
It is displayed as follows:
First name
Some company
2041 Smile Rd
New York NY
(999) 999-8888
I am not aware of the pure Markdown solution, but I really did not look, since the HTML way is so simple.
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