Who called from 2097048777

They claim to be TIGER NATURAL GAS, but the number is fake (no such number) and as soon as I ask for a number I can call them at they hang up. Five calls today, a few yesterday, never before.

They call me several times a day  (6) and say nothing. when I call back it says it is a non working number.

They call me 5 or 6 times a day and when  I answer  no one is there.  When I call back I am told it is a non working number

They called me twice today. The first was a hang up the second I said, hello and the person on the other end said "hello" then hung up. Very weird, I got the not a working number message when calling it back as well.