"Hey, how are you?" ( Text from a guy I ended things with about a month ago ) why do guys do that?

Lack of communication, I gave more than he put in, obviously I was getting used, so I ended it, but I made it clear I wanted no contact afterwards, nor to be friends, I'm not gonna reply back but I'm curious as to why guys do this? I'm sure it's one of these below: Wants to see if I kept his number and if I would reply Or Actually wants to see how I am

"Hey, how are you?" ( Text from a guy I ended things with about a month ago ) why do guys do that?
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