Said nothing.  Dead air.  Another 20th century fool just making long distance calls to awaken senior citizens ???

Asked if I was the owner . Then hung up.

Left message saying something like, "Hello, this is Mary. I need a business number please." Caller-id said "ACCOUNT SVCS" so I called back in case someone had dialed the wrong number (to let them know). A woman answered and said something like, "Hello, this is Mary Hart. Thank you for getting back to us. Is this the business owner?" When I said she had the wrong number,  she hung up.

Called my work phone. No reply when I answered. Guessing it's spam.

Called 35 minutes ago.  My Call Blocker blocks first time callers and requires them to call back.  They didn't.  Caller ID said "Account SVCS."  I'll block this number.