*** Presented by Markus Semm at State of the Map 2013 *** For the video of this presentation please see http://lanyrd.com/2013/sotm/scpkgq/ *** Full schedule available at http://wiki.openstreetmap.org/wiki/State_Of_The_Map_2013 House numbers and addresses are crucial for any application using geo data for reverse geocoding like navigation systems, telematics applications and many more. Currently the amount of house numbers in OSM is rather low: even in Germany, one of the top countries regarding the OSM dataset, just 10% out of 30 million house numbers have been added to the database so far. Keypad-Mapper 3 is an open source Android application aiming to support the process of mapping house numbers with highest possible efficiency. It targets newbies as well as addicted mappers.The presentation will demonstrate the application itself as well as the various approaches to mapping house numbers and addresses. **[Presented SuisseOpenStreepMap Conference June 2013 in German]**

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