My copy of Mac OS 10.4 is shipping from "ONTARIO, CA". What? Canada? Apple stuff usually comes from up by Oakland!
Turns out there's an ontario.ca.us down near Los Angeles. Presumably they mean that one rather than ontario.on.ca.
When I'm benevolent dictator, all these innumerable human settlements will get globally unique ids. I don't even see why ontario.ca.us needs a name; surely it's just part of Mega-City Two?