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. While there are some numbers that are hard to find, using reverse white pages may make your endeavor easier than you imagined.
Cellular numbers have generally been excluded from printed telephone books and directory assistance services. You will not find information on these when you use reverse white pages, as these listings are for landline numbers only. Whitepages offers a similar free white pages search for Canada.
There are now websites on the internet that offer services where you simply type in the mysterious phone number, and you then receive all the information that they bring up such as full names and addresses. Instead of paying per search, you pay one fee. You also need to remember that when using reverse yellow pages, you may not be provided with results if the business or person you are looking for is not listed in the public directory, or does not exist within the yellow pages.
Go for paid services that provide directories for cell phone numbers as well. It is also fully legal and totally confidential.