I don't answer from unknown numbers so I let it go to voicemail, this is the second time I get a call from this number but no message is left

I got a call from this number as well, multiple times actually. I've been getting a lot of calls from a lot of people lately, and I found out it's because of a survey I did on schools. That said, I also received calls from 205-259-2122, 602-639-6838, 914-346-8976, 914-346-8974, 416-494-6622 and 786-497-1520. Of these, one is from Keiser University, one from Northeastern University, and yet another from Grand Canyon University. I wonder, have you been getting calls from these people as well?

yes i just got one and tried to call it back and got no answer.  i dont know what mine was for exactly but i didnt answer it yet and they didnt leave no voicemail.

yes i did the same. i let go to my voice mail but no msg.

I did the same, but they left no message