Who called from 2102808919

I recieved a call from this number last week and today. The call was from the security clearance expo folks. I asked how they had my number and they said they found it on my posted resume online. Since my resume is online with clearance info, it seems feasible.

I called the Oxford Hotel in Denver where this guy told me the job fair would be, and they said there is DEFINITELY NO JOB FAIR.  

I called the Denver police.  They were actually very interested and are looking into it.

I have gotten many calls in the last week from this unknown number. No messages are ever left.  I am assuming this is a telemarketer, which I have already been put on the "do not call" list.  Hmmm

I received three calls from this number today.  They never leave a message.

Got a call today from this #. No message. How do these people get your cell phone number?