I have called my carrier (Comcast) and they cannot do anything about the 506 number which becomes a moving target, so I cannot block them all. The problem is they fill up my answering machine when I am gone, so after all my futile efforts. I now transfer to a live person, waste their time and sometimes become very rude in explaining I am currently on the toilet and ask if they would like me to explain what it looks like. My goal is if I put them on speaker and waste their time, at least it cost them something. I am frustrated that Comcast and the Do Not Call Registry can do nothing. HAVE FUN WITH THE IDIOTS.

I've told them I'm on the do not call list and asked them to take me off their list several times now. They keep calling me. Wish I knew who they were so I could pursue further action.

Didn't answer when I saw the number.  I too noticed though that it had too many numbers.  506 is the international country code from Costa Rica.  I don't know if this is where the call came from (this is also the area code for New Brunswick, Canada).  I'm sure whatever they are trying to sell is a scam.

A new credit card group that wants to lower my rates with a threat this is the last chance (of course 10 last chances in a months or so). Another moving target so I now follow their instructions to speak to an agent who can help me. I then go into my disabled voice (shouting Helwo, helwo, can you hep me?), this usually goes on for about 3 minutes, I am now starting to enjoy this routine and may add some more to it. Have fun, take up their time.

Pre-recorded drivel about my supposed "last chance to reduce my credit card interest rates"...  These assclowns have been calling about 1-2x per week for months...  They refuse to put anyone on their internal do not call list, and do not comply with the National Do Not Call List either.  In fact, when you ask them to remove you - they hang up!

This is a scam!  They're just looking to steal your credit card info - do not give any info out.  If you ask to be removed from the call list they just hang up or cuss at you and keep calling back.  I am on the Do Not Call list, but it appears they could care less.  They're either re-routing through an international line or spoofing the number so it cannot be traced and the telemarketers cannot be prosecuted.  Phone company can't do anything or block number because it is an 11 digit number.