Before the 1960s, the United States didn’t have one universal phone number for Americans to call if they needed help from the police or fire department. Callers simply had to know the phone number for each department in the area they were currently in.
I have no idea what my mum’s cell phone number is. I don’t think I’ve ever known the phone number of a girlfriend. Why would I? You probably don’t either! Contact lists killed them. But web service Go800 wants to skip the whole number thing entirely, letting you hit people…