To contact the property owner on 9Flats.com, users can typically find the property owner's contact information on the listing page for the specific rental they are interested in. Each property listing should provide a way to reach out to the owner directly, which may include a messaging feature or a show phone number option, depending on the owner's preferences. It is important to read through the listing carefully, as communication methods can vary. If a user has already booked a property, they may also find additional contact options available through their account dashboard. For the most accurate and up-to-date information regarding contact procedures, it is recommended to visit the current web page of 9Flats.com, where users can also find further assistance.