SPAM phone call. Ask for Mary and try to talk to you about college

Got a call from this number. They left no message and I tried to call back and it is no longer in service or disconnected.

When i recieved a call from this #, i answered and no one said anything and hung up. I tried calling back but it rang pn for 3 minutes before i hung up. It's annoying me too much that I almost got fired at my job because this number is repeatedly calling me. I've gotten 4 calls since 10 this morning. One each hour. I want an answer as to how this anonymous person is obtaining other people's personal phone numbers. This is ridiculous.

I've also received 3 calls within an hour at this point and I do not pick it up after reading this posts.  Also tried calling and it's disconnected.  How is that possible?

I also have received 2 calls from this number today!!! I think we all must be on the same website looking up things. Jobs? Travel? There is no one ever there when I answer or when I call back.