Who called from 8602484020

no idea who this is...they left no message.Does anyone know?

Called Apr 21. No message.

Number called left no message. Called number back. After 1 ring a message  "This number used for polling."

same here: missed call, no message; called number and heard "this number is used for polling" [beep]

received several calls no message, answered tonight and phone disconnected.  This is annoying and a nuisance.  Wish I had there number and could harass them.