(705) 727-9951, received a call from this number, they keep hanging up, who is this telemarketer

I have gotten no less than 6 calls a week from this number for the past two months.  Cell, home and work numbers are all being harassed.

I keep getting a call from this number but when I call back it says it is not longer in service, how can this number not be in service if it is calling me.

I also got a call from (705) 725-8710 and the lady told me to turn on my PC there were potential threats on it.  I asked where she was from and she said "Online PC support".  I said I had an anti-virus program on my computer that I was confident in.  She told me that wouldn't stop it and that I was not the only person getting this call, all PC users were.  I asked again where she was from and she started yelling at me saying that she already told me then told me my address (which was correct).  I told her to stop yelling at me and to not call me again and I hung up.

Nah... area code is 705 - that ain't Florida.  It's a Barrie, Ontario number.  (705) 727-9915.
Instead of complaining here, why not call the telephone company?  Only THEY can answer how you are getting called from an "out of service" phone number.

This hang up call is most likely a computer probe call to find out if your number is legit.  Once the computer confirms that your number is a live one, by you picking up the phone and connecting the call (you don't even need to say anything), it is put on a list and sold to telemarketers everywhere.That internet website where you type your number in to unsubscribe is another way they can verify that your number is legit.  They aren't going to unsubscribe you.The best way to combat telemarketers, besides signing up to the National Do Not Call list, is to not answer any unknown phone number calling you.  Eventually either the computer will think your number is dead and stop, and/or the live telemarketer will stop calling.  They less you answer, the less they call.  This has the added positive effects of wasting their time and paying someone for nothing.If the unknown number calling is legit, they can leave a message.You can see from these comments here how little people know how it works and how easy it is to find live phone numbers to harass.One last thing.  As more people sign up to the Do Not Call Registry, telemarketers will be left with a shrinking pool of numbers to phone, which means more selling number lists to try to make money, and more calls to you.There is also increased political calling as we approach an election and political phone calls are exempt from the Do Not Call list.Remember, don't answer that phone, no matter how much you want to, or be prepared to be harassed.