As of 2015, telephone look-up services are available online at whitepages.com, peoplesmart.com and spydialer.com. Most of these services are free, and users can look up cell phone as well as landline numbers.
Sites that provide these services typically open a miniature search engine where users type the name, number or email address of the people they are looking for. Clicking the Search button commands the engine to look up and provide results based on the search criteria. For example, whitepages.com provides the option of identifying unknown callers in addition to look up services.
Similarly, people may screen numbers from which they don’t want to receive calls and text messages. On the other hand, peoplesmart.com provides results for the carrier information and location of different people. Similarly, users can specify certain area codes in addition to finding the names of people whose number they have noted down. The information stored in the databases is updated constantly to make the results as accurate as possible.
While most of these services are readily available from conventional computers, users may download applications optimized for use on mobile devices such as smartphones, tablets and iPhones. The websites obtain the details from platforms such as social media, online address books and other public information databases, so the service is completely legal.