There are many different kinds of phone searches available for your use online. Since Google does have a large number of additional features, you may not have known that it has a directory that you can search with telephone numbers.
It is also reported that free directory services are more likely to out-of-date data. Often free services do not provide sufficient information for those seeking information about phone owners. It makes sense that the Internet would also be a good source to find information that would otherwise be out of reach.
The more information you can provide for the search engine the faster you will be able to get results. If at all, you are unable to find the name of a person related to a particular number then in all probability, it is an unlisted cell phone number. Even with the free residential phone number search you can find out the details of which phone provider owns that number and in which city they are based and this may help you recognize the number.
The whole process of signing up with paid services is simple and the search is effortless. Cell numbers are typically harder to track down and you won't find them in a free service.