Century 21 Landmark Realty » Business Directory If you your business isn’t listed here, contact us today for more information! Find a business using one of our Quick Links to search by business name. Go back to directory. Add to Address Book. Century 21 Landmark Realty Century 21 Landmark Realty 100 N State Hwy 5 Versailles Missouri 65084 home Work Phone: 573-378-4641work Work Email: kwlandmarkc21@gmail.comINTERNET Website: http://www.landmarkrealtyc21.com Categories: Business Updated 2 years ago.