Called 3 times consecutively without leaving any voicemails. It hangs up as soon as my recording comes on, and re-dials. Indication that it's either a robo-dial, or a telemarketer waiting for a live person to pick up.
Spoofed number. When I answered they said that they were calling on a recorded line but did not identify where they were calling from. Said they were calling because I recently inquired about social security benefits, I said I had not and asked where they were calling from and they hung up on me. When I called the number back got a message "your call can not be completed."