CleanBrowsing is the best, i’m using it right now, it’s much better than OpenDNS.
CleanBrowsing Family Filter:
IPv4 address: 18.104.22.168 and 22.214.171.124
IPv6 address: 2a0d:2a00:1:: and 2a0d:2a00:2::
P.S.For the pcwrt staff i can report you that Norton ConnectSafe doesn’t exist anymore. The service has been closed, those DNS doesn’t work anymore, you can check this news on internet. I think you can delete them from the DNS list.