common isp/iap name servers

open-relays

opendns

    208.67.222.222
    208.67.220.220

FR

orange iap

    192.168.1.1
    80.10.246.2
    80.10.246.129

dedibox isp

    62.210.16.6
    62.210.16.7

wanadoo iap

80.10.246.2
80.10.246.129

resources

https://www.commentcamarche.net/faq/1496-serveurs-dns-des-principaux-fai