I have been getting called from this number for at least a month, maybe longer. I don't answer, I figure if they know me they will leave a message. But they never do.
They called and didn't leave a message. I called back and the man had my name and acted like he knew me. He said his company was "Herbal Group" and was offering a weight loss special offer. I told him that I was on the National Do Not Call list and asked him if they ever checked that list. He said that they did and if they saw my number they would not have called. I told him to take my name out of their system and to never call back. I have also blocked this number (I have AT&T Uverse.)
A quick Google search of this group shows that they get a credit card number and bill for unwanted/unordered merchandise. (http://www.complaintsboard.com/complaints/herbal-group-c146027.html)
The 504 area code puts this company in Louisiana.