WerRuft.info is an online community and information service that helps people identify unfamiliar phone numbers and understand how other users have experienced calls from them. Visitors can search for a telephone number and read user-submitted ratings, comments, and reports, including information about suspected advertising calls, spam, call centres, and possible scams. The site covers numbers from Germany and other countries and displays recent searches alongside randomly selected comments, giving users examples of the kinds of calls others have reported.

Users can also contribute by rating numbers, publishing comments, and sharing details that may help others decide whether to answer or return a call. Reports describe a wide range of experiences, from sales calls and unexplained hang-ups to suspected fraud and legitimate organisations. WerRuft.info presents these contributions as community feedback to support informed decisions about unknown callers. Its resources also include a blog, frequently asked questions, information about telephone prefixes, and search features such as random number lookup.