It is in Fulton County, but not within the incorporated city limits of Atlanta.
Don t trust that web application, it doesn t work. It says not within the city limits to everything, even the address of Atlanta s city hall ...There s a link below with a phone number you can call to find out for sure. That area is the outskirts of Atlanta so it could be within city limits or it could be in Sandy Springs.
I think its still considered Sandy Springs. I work down the street from there and we are considered Sandy Springs.