You can also safely use .home .corp and .mail as those have been explicitly rejected by ICANN on the basis that they would cause widespread naming conflicts. I have my devices configured to redirect queries against .home to a local nameserver, leaving .local open for avahi.
Comments
The correct one to use is .internal
It is reserved by ICANN since 2024-07-29.
https://en.wikipedia.org/wiki/.internal https://www.ietf.org/archive/id/draft-davies-internal-tld-00...
You can also safely use .home .corp and .mail as those have been explicitly rejected by ICANN on the basis that they would cause widespread naming conflicts. I have my devices configured to redirect queries against .home to a local nameserver, leaving .local open for avahi.