Most districts in our area only have one high school. All the schools have Naviance. Plus everyone who cares about this type of stuff (eg has kids who applied or will be applying or applied last year) gets the information from friends with kids in the neighboring school district. Everyone is always comparing and I will hear, OK West HS got 2 Hs and 3 Dukes, a Dartmouth and 3 Cornells and a Vandy, 5 Skidmores, 12 U Michigan or whatever. Depending on my sources I will usually know if the kid had a hook as well.
Most districts with 99% college attendance will list the college in what is handed out at graduation. Most private and public schools will advertise their acceptances in the local paper (no names or first names only). I think there is an opt out if a kid wants.