Who's Number Was That?

Sorry, who's number was that just now? Aiks! I hate that every time when someone called me but I don't even know who that was.

I think I need to use the Reverse Cell Phone Lookup to get the number. But that is not a problem anymore as I would not need to pay any cent for the service. I can also find the No Call List Information as well by just using the site that I found the other day. Well, let me check who called me just now.