find_domains

• https://news.ycombinator.com/item?id=43285725

• https://news.ycombinator.com/item?id=43286425

• https://www.merklemap.com/

• https://crt.name/

• https://www.certkit.io/tools/ct-logs/

• https://subdomainfinder.c99.nl/

• https://certgrep.sh

• you can request the list of domains of a TLD from ICANN

• https://news.ycombinator.com/item?id=49895588