What is the meaning of "“No place you would have heard of"?

I turn to Jeff. “More wine?”
“I’m good,” he tells me. To Sam, he says, “And where have you been living these days?”
“Here and there.”
The same answer she had given me. One that doesn’t satisfy Jeff. He lowers his fork to give Sam a cross-examination stare.
“Where, exactly?”
“No place you would have heard of,” Sam says.
“I’ve heard of all fifty states.” Jeff flashes a friendly smile. “I can even recite most of their capitals.”