web.de is a German Internet portal which also provides an email service, address books and calendars.
Two separate DAVdroid accounts are required (one for CalDAV, another for CardDAV) because there are no SRV records.
CalDAV Base URL:
CardDAV Base URL:
User name and password: your web.de user name and password
Contact group method: No CardDAV contact group support. Choose "per-contact categories" as contact group method to minimize problems.