What can I do about prank calls?

Question

I've been receiving prank calls and I would love to trace the numbers to find out who the culprits are for several reasons.
Where can I trace phone numbers for free?
I can't use my phone bill for another month since the bill cycle started around the time that these calls started coming in.
I don't want to go to the police unless the calls are from unknown numbers because the pranksters could be friends or family although I highly doubt it.

Answer 1

I think you can block them by using *87 (check with your phone company or local phone book to confirm the correct code for blocking calls) after they call.
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Answer 2

i know that majority of the phones have a call screening mode where you can receive calls from actual phone numbers but you could automatically reject calls from unknown numbers. Police usually dont get involved unless its an actual life and death situation. There isnt really a website where you could check all of your calls. eventhough your phone cycle just started your phone company can usually show you your up to date version of your phone bill you just have to ask them for it. also most phone companies have an online account where you could check up to the hour use on your phone. Nextel and Cingular websites will show you what number has been calling you even if your cycle is only in one or two days.
good luck...

Answer 3

Try typing "Reverse phone number look up" in google if you have the phone number.
If the number is listed you'll get a name and address.
I listed links to where you can look up cell phone numbers and phone numbers but they charge $15 each to get the owners information.

Answer 4

go to your phone company and tell them you are getting pranked, if they cant help you with that, tell them you want to change your number i doubt the police will do anything unless the pranksters threaten your life