Who called from 7204458309

I got a call from this number too at my work line. Answered, but nobody said anything on the other side.

Got my first call from this number at 8:04 am. No message left.

Probably a new spam number.

Just got a second call from this number - no message left again. They are now blocked!

Now have called three days in a row - no idea who this is, but with no message left it can't be good......

Are now calling me 4-5 times a day!

No message is ever left. I suspect this is a spoofed telephone number - probably automatically shows a number based on where you are located so you'll think it's a local call. I'm nowhere near the 720 area code.