For my reference and if it can useful to someone else, here is a list of public DNS servers to adress.

Level3

  209.244.0.3


  209.244.0.4

Verisign

  64.6.64.6


  64.6.65.6

Google

  8.8.8.8


  8.8.4.4

DNS.WATCH

  84.200.69.80


  84.200.70.40

Comodo Secure DNS

  8.26.56.26


  8.20.247.20

OpenDNS Home

  208.67.222.222


  208.67.220.220

DNS Advantage

  156.154.70.1


  156.154.71.1

Norton ConnectSafe

  199.85.126.10


  199.85.127.10

GreenTeamDNS

  81.218.119.11


  209.88.198.133

SafeDNS

  195.46.39.39


  195.46.39.40

OpenNIC

  96.90.175.167


  193.183.98.154

SmartViper

  208.76.50.50


  208.76.51.51

Dyn

  216.146.35.35


  216.146.36.36

FreeDNS

  37.235.1.174


  37.235.1.177

Alternate DNS

  198.101.242.72


  23.253.163.53

Yandex.DNS

  77.88.8.8


  77.88.8.1

UncensoredDNS

  91.239.100.100


  89.233.43.71

Hurricane Electric

  74.82.42.42

puntCAT

  109.69.8.51

Nerim

  62.4.16.70


  62.4.16.80

OVH

  91.121.161.184


  188.165.197.144

Oleane

  194.2.0.20


  194.2.0.50