Since 2015 many things changed, as well as weblinks in the Wikipedia's article.

I hope that a .xlsx-file with "Amtlicher Gemeindeschlüssel (AGS)" can somehow assist.

You can find if here https://www.destatis.de/DE/Themen/Staat/Steuern/Steuereinnahmen/Publikationen/Downloads-Realsteuern/hebesaetze-realsteuern-8148001187005.html

Content look as following:

Data provider "Statistische Ämter des Bundes und der Länder"

Since 2015 many things changed, as well as weblinks in the Wikipedia's article.

I hope that a .xlsx-file with "Amtlicher Gemeindeschlüssel (AGS)" can somehow assist. Data provider "Statistische Ämter des Bundes und der Länder".

You can find if here https://www.destatis.de/DE/Themen/Staat/Steuern/Steuereinnahmen/Publikationen/Downloads-Realsteuern/hebesaetze-realsteuern-8148001187005.html

Content look as following:

Geocode your addresses with an geocoder of your choice and than join data from above .xlsx-file via "gemeinde" as a key, before merge all subsheets in one.