I used https://www.dnsleaktest.com to check VyprVPN today and the website tool told me I have two ISPs having access to my browsing data. This is the message I received regarding the ISPs that are showing up:
What do the results of this test mean?
The servers identified above receive a request to resolve a domain name (e.g. www.eff.org) to an IP address everytime you enter a website address in your browser.
The owners of the servers above have the ability to associate your personal IP address with the names of all the sites you connect to and store this data indefinitely. This does not mean that they do log or store it indefinitely but they may and you need to trust whatever their policy says.
If you are connected to a VPN service and ANY of the servers listed above are not provided by the VPN service then you have a DNS leak and are choosing to trust the owners of the above servers with your private data.