Had many call, but I never pick up the phone, because I don't know the caller.
I'm on the no call list.

Tried of these calls, no one leaves a message, we r on the do-not-call list, why r we getting these calls???

The DNC list is like the lock on your front door - it only protects you from honest people. So don't get mad - get even. Report them - harass them back if that is your style. Or just ignore them.

Political, charity, surveys, and bill collectors are exempt from DNC lists. I like that FBI line - I just tried this...
"Your call has been automatically forwarded to the local police department, please hold while I get my supervisor...and put them on hold and see how long they stay. But most often I just don't answer. If you don't have caller ID get it. And get an answering machine (not an in phone service) where you can hear when a message is being left so you can pick it up if it really is someone important." My rule: No message, It's not important.  

If you know who calls, if you want to bother, you can also e-mail them (I use a nom-de-plume account) and write them and tell/ warn them that they have been officially informed not to call, gift, give or sell my number or I will take legal action for harassment. Though I suppose if they have your number they can find out who you are if you are listed. If it wasn't necessary I would have an unlisted number.  

Thanks for the folks who were able to find out who these twits are. I'll keep my 10 foot pole handy.

Getting calls from the Pro Life Committee, and I DO NOT want to hear from these people at all.
Number came up as 734-265-9115. Started as automated, then a person, female, came on the line. She said website was prolifecommittee.org
Also getting calls from 323-693-0089, don't know if same group.