Do phone companies really sell your phone numbers...?

such as At and t and Verizon?

I hear that they do and that’s how these telemarketers are getting your cell phone number.

I have a fairly new Verizon phone and I’ve gotten maybe 5 calls from unknown numbers, most likely spam callers.

I’ve always wondered how these people get my number when I haven’t given it out to anyone except my family.

I’m thinking this is the only solution. Either that, or the websites saying they don’t sell or give out your info actually turn around and sell it.