Who called from 4239331708

I got a call today asking for my name or my husband's.  He was calling about a sweepstakes he said my husband entered.  He had his name right but he has been deceased for 7 years.

Got repeated calls. Caller ID reads: Chattanooga TN. No message

Called me today but no msg.

When I answered call and said Hello, how may I help you. Heard silence for 30 seconds then they hung up.

Received a call at dinnertime.  Sounded like dead air on the other end.  After 5 - 10 seconds, caller hung up.  They said nothing.