I'm getting calls on my Iphone from my house phone?

I've been recieving calls on my Iphone from my house phone. The calls that I get from my house pone are automatically transferred to my Iphone, but when someone calls the incoming number is that of my house phone? What's going on?

I think you tried calling your house number before with *71 or 72 or 73. That's what happens when you do that. Try reversing it by calling one of those star numbers to your house number and if that doesn't work call the company but I'm pretty sure that's the problem