Testing DNS Servers
NSLookup - to test dns server
nslookup domain dns-server
nslookup google.com 8.8.8.8
nslookup algissalys.com 8.8.8.8
Public DNS Servers
Tested for nslookup response 20160306
Google
8.8.8.8
8.8.4.4
OpenDNS
208.67.222.222
208.67.220.220
NortonDNS
198.153.192.50
198.153.194.50
Comodo
8.26.56.26
8.20.247.20
DNS Advantage
156.154.70.1
156.154.71.1
Scrubit
67.138.54.100
207.225.209.66
GFI
4.2.2.1
4.2.2.2
4.2.2.3
4.2.2.4
4.2.2.5
4.2.2.6