How to Find People's Cell Phone Numbers. Currently, cell phone numbers rarely are listed in public resources such as White Pages or Yellow Pages. If you want to find someone's cell phone number, you'll have to resort to other means. Here are some ways to find those numbers.
Ask a mutual acquaintance for the number. It's likely you know friends or relatives of the person whose number you want.
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Give the person your cell phone number. If he or she calls you, the number will be stored in your phone. You'll need a reason for the person to call you, so you may have to invent one.
Ask for a cell number so that you can inform the person of an event or something otherwise significant. Be creative; invent a situation that might necessitate a call from you. If this is the case, the person probably will give you the number.
Research online. Several online "detective" database services can find a cell phone number without anyone knowing you asked for it. The drawback is that this service is not free.
Become your own detective. Pay a subscription fee of around $30 for access to online databases. Many of these programs also grant access to addresses, e-mail and court records as well.
Hire a local private investigator. For a fee (usually hourly) they will use their online resources, which may include the above-mentioned services, to find the cell phone number you need.