Phone number

Does anyone on here know how to do a phone number search to find the name of who the phone belongs to?? I’m not sure if this is the right page to post on but I was just wondering because I’m suspicious that my baby Dad is going behind my back and I need to find out if I’m just crazy or have validation to leave before the baby is born as I don’t want to raise my son thinking itsokay to lie to the woman you love and live with for years ...