The internet offers many convienient services
In the dawning of the internet people wanted to be able to find information easily and conveniently. Over the years the internet evolved into a cascade of information services ranging from how to do things to finding people without having to hire a private investigator. Although at first many of the available services were utilized by said private eyes, nowadays you can just punch in a few keywords into Google and find several sites that will give you direct access to reverse lookup phone numder through a public records search or other such data base that contains these numbers. These services are far more vast now than they used to be!