i have been recieving calls from this number for 2 days. they do not leave messages,and when i try to call it i keep getting a recording saying that the code or number i dialed was incorrect. who could this be?

Number left no message- tried to call back and it tells me that the number or code is incorrect and try the number again.  saw another blog of people getting this same problem.  Supposedly its a sweepstakes thing?

I've been getting a series of phonecalls as well, but I havent answered them.  This one just called about 20 mins ago, didnt pick up. Left no message either.

I wonder if theyre just looking to see if the numbers are working and if people are picking up to confirm for future calls/annoyance.