Berlin consists of 96 localities belonging to 12 boroughs. The names of the 23 boroughs that existed until the administrative reform in 2001 are still used colloquially. If you want to know where you actually are, the app "Berlin – Boroughs & Localities" can be helpful.
The app determines the borough of Berlin and the respective locality where you are and shows your location on a map. Furthermore, the particular borough before the administrative reform of 2001 is displayed.
The basis for the boundaries of the boroughs and localities are the "Geometrien der Ortsteile von Berlin" (http://daten.berlin.de/datensaetze/geometrien-der-ortsteile-von-berlin-juli-2012, Statistical Office Berlin-Brandenburg, License: CC -BY 3.0 Attribution).
The satellite image which is used as background of the map derives from the European Space Agency / ESA (http://www.esa.int/spaceinimages/Images/2015/09/Berlin_Germany) and was adapted for the presentation.