If you have pieces of information about a person who called you, but still no name behind the caller, try the AT&T Directory Assistance website. This method works best for home phones, although cell phones have been known to be in this directory as well. Navigate to http://www.corp.att.com/directory/ and type in as much information as you know about your caller. Once you are done, click on search to see if anything comes up. One of two things will happen:
1: You will be directed to a partner site, where they will ask you to pay for some information because the AT&T Directory did not find any information about your number. (Or you used a cell phone number, in this case read this method instead.
OR
2: You will be presented with a page that displays contact info for the phone number listed – it will be free and won’t cost you anything. As of 2014, you may need an account logged in with AT&T to use the directory after a certain amount of tries, so do your best to enter as much information as you can to perform a good reverse phone search the first time and not waste your chances.
If this works for you, let us know! If not, check out the other methods, starting with The Facebook Method