I've gotten a bunch of calls from an unknown caller over the past few days, how do I find...?

Telemarketers are always calling me in the evening right as I'm sitting down to dinner. Totally annoying when I'm trying to spend some quality time with my family. Use a reverse lookup on the internet to find out who called you. A bunch of them cost money but you you can get a free reverse phone directory here. If you still have the stuff from the answering machine saved or remember what they left, you also report them there and get them to stop calling.