direct

# exclusively for Internet infrastructure purposes
arpa

# Reserved TLDs: https://en.wikipedia.org/wiki/Top-level_domain#Reserved_domains
alt
example
internal
invalid
local
localhost
onion
test

# ad hoc TLDs: https://en.wikipedia.org/wiki/List_of_Internet_top-level_domains#Internet_Engineering_Task_Force_proposals_for_local_TLDs
intranet
private
corp
home
lan

# pseudo-TLDs: https://en.wikipedia.org/wiki/Pseudo-top-level_domain
exit
tor
i2p
# blockchain
eth
crypto
zil
bit
xlm