Who called from 3124892154

I have received 3 calls within a two hour span! No message was left and tried calling back and it stated it was an unallocated number.

Someone sold my name and phone number to a place claiming I requested info on furthering my education when in fact I did no such thing.I just graduated from a technical school July 18.

I received 3 calls from this number within 1 hour. No VM, when i call back it says number unallocated. Wtf?

wanting to sell me some education after I signed up on a job website.

They continue to call and hang up...have no idea who they are looking for