There are a variety of ways to find someone's cell phone number without asking them in our new technological information age, some that are free, others that cost money. The reasons you need this number may need to be taken into account to make sure you are not invading their privacy.

Internet Search

A vast amount of information comes up by simply searching for someone's name using a general search engine. There are a number of different online directories that may pop up in the search results that may have a listing of a cell phone number, maybe a business page or a social networking site. Perusing this extensively could save you trouble and money trying to use other means to track down someone's cell phone number. Also checking your old emails from this person--if you have any--may reveal his cell phone number to you, as many people put their contact information at the bottom of their emails.

Reverse Look-Up

There are many different online websites that can look up people's cell phone numbers if you simply provide their name to the service for a base fee per name and number. The more information you can provide these reverse look-up companies, the easier and possibly cheaper it will be for them to find the number for you. Of course, the name the phone is listed under may be whom it is billed to and not who actually uses the phone, so there may be some numbers that become more difficult to find due to this fact.

Friends and Business Associates

By simply asking people who know this person, you can probably get his cell phone number, unless there is some reason why he wouldn't want you to have the number. Cell phone numbers are given out regularly these days and many people have multiple lines for their phones, so that they can separate different people in their lives, from business and personal. So see if anyone will simply give you this number before you spend money, snoop or invade someone's privacy.

Source:

Find Free People: Phone Number Look Up

I Info Search: Find a Cell Phone Number