You have found this web page because you want to know what the domain msftncsi.com is and who owns it.
We can confirm this URL is used by Windows 8.1 and earlier to test if you have a working internet connection.
Windows has an internal component for network connectivity changes detection called “Network Connectivity Status Indicator” (NCSI as known). This component, among other tasks, performs a background testing to determine if the machine has Internet connectivity, engages his brother, the Network Location Awareness (or NLA), to identify if it’s in a domain or a public network to define the proper firewall profile, etc.
Duncan is a technology professional with over 20 years experience of working in various IT roles. He also has a wide range of other skills in radio, electronics and telecommunications.