Who called from 7189899367

I have gotten four calls today (in three hours) on my cell. All of them different out of state numbers. None of them leave a message. Very frustrating.

Just getting missed calls with no message, this should be illegal, I don't want to miss something important, but I work in a restaurant and can't answer my cell phone while waiting tables

Please no more calls

This number has called already twice. Once yesterday and now today leaving no message. It'd probably some scam or survey.

Who is the one making the calls? I dont know the person calling it, is it important?