This website provides a service to report telemarketing calls. Telemarketing calls can be annoying, and this website allows you to create a list of people you do not want to call you; users are also able to report their practices, so that they do not continue to make calls to people that do not want them.
If you're curious about a business, you can also use this website in order to do a bit of research on a particular business. opencaller has reviews and feedback that others post about the person who owns the specific phone number. This allows you to see the good and bad things that people say about specific companies. Aside from all of the functions below, opencaller also has forums and news articles that users can read.
As you can see, there is a lot that opencaller has to offer. Users can rely on this website as a free phone number directory, as sometimes a regular paper phone book does not have the answers.