all I can say is rarlab.com works here. I use in this order for dns servers.
1 - my own hosted on a dedicated server.
2 - google dns
3 - router, which has VM's dns assigned via dhcp.
1 <1 ms <1 ms <1 ms home.gateway2 [192.168.1.1]
2 8 ms 8 ms 11 ms cpc14-leic14-2-0-gw.8-1.cable.virginmedia.com [8
2.30.112.1]
3 6 ms 7 ms 6 ms leic-core-1a-ae3-2232.network.virginmedia.net [8
2.3.33.49]
4 37 ms 10 ms 11 ms leed-bb-1a-as8-0.network.virginmedia.net [213.10
5.172.17]
5 17 ms 14 ms 17 ms tcl3-ic-1-ae0-0.network.virginmedia.net [212.43.
163.198]
6 15 ms 14 ms 13 ms ldn-b2-link.telia.net [213.248.93.69]
7 12 ms 11 ms 17 ms ldn-bb1-link.telia.net [80.91.250.225]
8 27 ms 26 ms 25 ms hbg-bb1-link.telia.net [80.91.250.220]
9 35 ms 33 ms 35 ms bei-b2-link.telia.net [80.91.254.207]
10 38 ms 38 ms 40 ms dnsnet-ic-134271-bei-b2.c.telia.net [213.248.69.
26]
11 37 ms 34 ms 37 ms 217.70.136.60
12 38 ms 34 ms 45 ms
www.rarlab.com [217.70.129.242]