.INTERNAL is now reserved for private-use applications

Can we get .local or .l added for private-use applications too?

Please also reserve .lan which is what I now prefer to use since .local got stolen from private networks.

You can use .home.arpa.

https://datatracker.ietf.org/doc/html/rfc8375

You can use a public subdomain like box.uuid.california.usa.mydns.org but we need something short like .l or .lan :) .home.arpa is terrible.

I have been using .l personally for a couple of years and it works fine except Chrome won't recognize it as a tld and would start a google search. Once it is visited a couple of times, it autocompletes it as a webpage so it's quite usable afterall.