Can You Really Track IP by Phone Number? How Does It Work?

Hey guys,
So I’ve been seeing a lot of stuff online about how you can track IP by phone number. Like, is that even a thing? I mean, I get that IPs are tied to devices and networks, but how does tracking an IP by phone number actually work?

I’ve heard some people say it’s possible through apps or services, but idk if that’s legit or just some sketchy stuff. Like, can someone really track IP by phone number without you knowing?

Also, is it even legal? Feels kinda invasive tbh. Anyone got any experience with this or know how it works? Or is it just one of those internet myths?

Thanks in advance for any info! ✌️