A total of 15 sites are hosted on 216.134.221.80.
Here are the first 5 as they would appear when searched for:
secure.serve.com/FoH
(null)
secure.serve.com/IxmsNPSEh1WmOf1SQDjf0w==
(null)
secure.serve.com/WPUCFVTUi1gP3TlsaQOVxg==
(null)
secure.serve.com/ZIxgTw2YWLU5W1QYfewzcQ==
(null)
secure.serve.com/yashOmHVWv8UBTk
(null)
...and the list of the remaining 10:
secure.serve.com/O0t5TETpblyM
secure.serve.com/User
secure.serve.com/dNpBIdwcDtKo5bB0H4JANA==
secure.serve.com/PaahxgZ5ajHlIBszl8wWhg==
secure.serve.com/QOcQPhERVPytNupKjTFsxA==
secure.serve.com/VUk2QH0cAo
secure.serve.com/Account
secure.serve.com/wNb
secure.serve.com/zWLDOzG4jvCD3ecjCtTzWw==
secure.serve.com/QUbsgqDwpjjbkpOgwgOeaw==