Maybe a friend switched providers and numbers, or maybe someone I know is calling from their work line (worst case scenario, someone is hassling you via phone). Here's a method to help reverse track someone calling you without paying a fee...
Unlike in the past with land lines, there isn't a directory for cell phone numbers, which means there are a multitude of pay online services providing reverse search information for names, numbers, and addresses. But because a great many of us are now social media site users, there's a Google search trick you can use to yield a connection between name and numbers:
Using Google.com, type in the following with the phone number in place of brackets and "phone number here":
[phone number here] site:facebook.com
If, for example, you are trying to do a reverse cell phone search free on the number 888-123-4567, you would enter:
If the ubiquitous Facebook doesn't work, try switching out LinkedIn.com or Google+ for the site designation. If the person is active online, there's a decent chance this search technique will bring back some information.
(Image: Gregory Han)