https://blog.cloudflare.com/introducing-1-1-1-1-for-families/
No Blocking
Primary DNS: 1.1.1.2
Secondary DNS: 1.0.0.2

Malware Blocking Only
Primary DNS: 1.1.1.2
Secondary DNS: 1.0.0.2

Malware and Adult Content
Primary DNS: 1.1.1.3
Secondary DNS: 1.0.0.3



https://controld.com/?
https://www.ghacks.net/2021/04/25/controld-is-a-new-dns-service-by-the-makers-of-windscribe-vpn/
Unfiltered: 76.76.2.0
Block Malware: 76.76.2.1
Block Malware + Ads: 76.76.2.2
Block Malware + Ads + Social: 76.76.2.3


NextDNS:
https://my.nextdns.io/

These Synology Routers have pretty good parental controls
RT2600ac + MR2200ac
https://www.youtube.com/watch?v=gmesl3nKVbU
https://www.amazon.com/dp/B07HPSQZKN
https://www.amazon.com/dp/B01N5MPTG1



I tested this next one on 4/7/2021, they did not seem to block anything:
https://adguard.com/en/adguard-dns/overview.html
IPv4
For "Default" servers:
94.140.14.14
94.140.15.15

For "Family protection" servers:
94.140.14.15
94.140.15.16


keywords: DNS, Ad, Block, Filter, Adult, Child, Protect, Protection