If you need to call someone but don't know their telephone number, there are several ways to find it. The traditional method of locating phone numbers is to use the telephone book. The average telephone book has home and business lists alphabetically arranged and grouped into locality. In the back, you'll find the Yellow Pages, which contain ads and contact info for a spread of companies. These days many folks are making a choice to have unlisted numbers so as to protect their privacy. This makes things a bit harder, although not impossible.

You can often find telephone numbers on the Internet. A way to do this is thru a search site like Google or Yahoo. Sometimes, if you simply input the person's name you will come up with their telephone number. This most frequently works for folk who are listed. For example, if you are looking for someone who lives in another locality than you and therefore is not listed in your telephone book, a search engine query just might lead you to their number.

Of course, you may not come up with anything. In that case, you'll need a little help. There are a wide variety of agencies on the Internet who specialize in helping you find contact information. A number of them are free, and many of them cost cash to use. Some offer free features and paid features. A lot of them charge either by the month or per search. Usually, you will have to pay to locate an unlisted number. Whether or not you should do this depends on your motives for looking up the number in the first place.

Another way to find phone numbers is by performing a reverse search. There are a number of reverse search directories online that are free to use. When doing a reverse search, you will need information about the person such as their name, email address or physical address. Sometimes, when you input this information you can find their telephone number. This isn't always the case, however. For folks who you've deemed most unlikely to find, the services of a personal investigator might be needed. While this is the most expensive way to find someone, you're likely to get the information you need as today's investigators have access to high-tech resources and databases that the general public does not.