they call all the time

It is not the first time this caller rings my phone. My number is not unlisted but, since the caller did hang up as soon as the answering machine started it means they like to talk to someone personally. They shoukld be stopped

These idiots phone me yesterday evening and I didn't pick it up and they didn't leave a message so I don't know what they want.  They called my unlisted number so I assume they dialed sequentially which is ILLEGAL so DON'T TRUST THEM.

This number calls Saturday evening and hangs up after I answer and repeat Hello twice.  It has called numerous times.....upsetting in that they don't identify themselves.

Who is it?