If I sign up for the Pro plan, can I use it on my router at home and also on the router at my parents' home?
Yes, Pro is for yourself and close family as well like parents or grandparents.
The Linked IP I enter on the NextDNS website is mine. They would have a different IP (different home). Does that matter?
Killua Zoldyck It's one linked IP per configuration, but you can create multiple configurations on one account, each with their own specific DNS servers and linked ip.
Romain Cointepas That is an awesome solution, thank you!!