Who called from 8187424815

I thought my dad was calling from a Landline because he lives in the area and has same area code. They hung up when I said I couldn't hear them. I live in WA.

These people have called three times today while in a meeting at work (during working hours) and had the nerve to not leave a voicemail?

They keep calling me too. I call back and it sounds like a person picks up then hangs up. I've just been hitting redial for the last 30 minutes to give them a taste of their own medicine.