Check the lower level which is listed for the area. If it is below 11, most likely you should assume it is 11. Other than that, you have to go to those places, when you are at the minimum level listed.
Do not forget that this is just important for exploration experience. You still seem to get full observation even at level 1. This is why I go to Trothon/Organia, when I am below lvl 30, and once again, I go there when I am above.