According to TorrentFreak, Netflix has started cracking down on users who turn to VPNs to get around region restrictions on Netflix content:
Over the past weeks Netflix has started to take action against people who use certain circumvention tools. The Android application started to force Google DNS which now makes it harder to use DNS based location unblockers, and several VPN IP-ranges were targeted as well.
. . .
Netflix is reportedly testing a variety of blocking methods. From querying the user’s time zone through the web browser or mobile device GPS and comparing it to the timezone of their IP-address, to forcing Google’s DNS services in the Android app.
Which is weird, because Netflix’s marketing slogan is “Watch movies & TV shows anytime, anywhere.”