I use three separate and unrelated providers. The first being myself (a single Linode VM), and the other two: http://rollernet.us/ http://rollernet.us/ https:/

I use three separate and unrelated providers. The first being myself (a single Linode VM), and the other two: http://rollernet.us/ http://rollernet.us/ https://puck.nether.net/dns https://puck.nether.net/dns They both offer free backup DNS.