A total of 21 sites are hosted on 104.94.21.53.
Here are the first 5 as they would appear when searched for:
ecomtheme.com
The #1 marketplace for premium website templates, including themes for WordPress, Magento, Drupal, Joomla, and more. Create a website, fast.
graphicriver.net/user/Layerform
(null)
astudio.si
We are Anpsthemes, a team dedicated to bring you beautiful designs and high quality coding. Our team is based in Slovenia. Our newest item is Industrial – Manufacturing WordPress Theme, be sure to check our best seller Constructo – WP Construction Business Theme.
codecanyon.net/user/nCrafts
(null)
videohive.net/user/foreigner
(null)
...and the list of the remaining 16:
themeforest.net/user/activetofocus
themeforest.net/user/Envalabs
themeforest.net/user/TeslaThemes
themeforest.net/user/Granth
themeforest.net/user/freevision
codecanyon.net/user/MaddinXx
audiojungle.net/user/jhunger
photodune.net/user/Subbotina
codecanyon.net/user/DeanDev
themeforest.net/user/ThemeSphere
themeforest.net/user/QuadCodes
themeforest.net/user/Tokokoo
themeforest.net/user/Met_Creative
themeforest.net/user/nextWPthemes
themeforest.net/user/refeti