Who called from 8048849011

A robocall ("Its Julie from Rewards redemption").. keeps calling from different phone numbers. Its seems to be some marketing / scammer  offering a $100 Rebate Voucher / redemption card .. which they say can be used in Walmart/Target/Homedepot just for visiting one of their affiliate web sites. I never leave my phone number when I go to a web site, so I know this is a SCAM. A search shows this number to be from Richmond, Virginia. A Level 3 Communications LLC - VA with a spam score of 97%.

missed call. virginia number. no voicemail left.
I blocked the number.

Call from an unknown number to my mobile. Left no message. I'm on national do not call list, so have blocked it

From where the hell these scammers getting the cell numbers??

Received a call from 1-804-884-9011.  They hung up after a couple of rings.  No one there.