Because U.S. citizens put their private phone number on just about anything, it’s easy to make a huge database — even beyond that of a typical public record search. Marketing professionals say that Canadians, however, are less likely to put down their private numbers on forms in the mall or on the Internet. This fact has a lot of cell phone directories setting up shop only in the United States where they can get access to millions of phone numbers easily. Above the border though, there are only a few places that have set up a Canada cell phone directory.