Originally posted by gambit05
It's a track & trace number for a package given by the post
https://www.post.ch/EasyTrack/submitParcelData.do?domain=www.post.ch&defaultLanguage=de&reference=/swisspost-tracking&formattedParcelCodes=99.40.104852.43033503;&p_language=de
In English:
https://www.post.ch/EasyTrack/submitParcelData.do?domain=www.post.ch&defaultLanguage=en&reference=/swisspost-tracking&formattedParcelCodes=99.40.104852.43033503;&p_language=en