Before you can look reverse up phone numbers, you need to have a vital piece of information: the phone number. While the Caller ID service on your landline phone may be able to pick up many of these, they can not get them all. However, there are ways to capture any number that comes into your home.
The answer is a trace line. This can be set up into your home, usually by the telephone company or by a private investigator. Then you have all calls coming into your home forwarded to that line. It's that easy. Every phone number that calls your home will be recorded via the line, even those which are unlisted or are blocked in some other way.
Typically, the phone number itself will not do much good alone. So you can take the newly accepted number and enter it into one of these reverse look up phone numbers services that are available. If the number is unlisted or coming from a cell phone, you'll probably need to use a for-fee service to get the information you want.
When you use the number at one of these services, you'll be able to access information about the owner of the number, including the full name, address, other contact numbers, and more. If you're having a problem with a caller from that number, you now have enough information to take action against them.
If you need to do a trace line, a fee may be involved or you may need special circumstances to have the service provided. Contact your local phone company to find out what would be required.