SSDD.  Robo calls from dummy numbers looking for live bodies to sell to other people.
Dialed number and it stated: Press 9 to be placed on the do not call list.  No other information available, and I keep getting periodic calls from various numbers that this scamming company makes up- no message left ever.

My recommendation is to ignore the calls and never call them back- you won't be able to get rid of the spam calls after that!