How can I find out who a phone number belongs to?

Yesterday, I started getting texts from a number with the same area code as mine. No matter how many times I ask, the person won’t reveal who they are, they keep saying things like “guess.” Based on the way they’re texting, I’m almost certain it’s some random girl who’s into me or something along those lines.

I’ve already asked around, probably 10 people so far, and no one recognizes the number. Any ideas on how I can figure out who it is?