dig

dig usage guide⚑

Get primary DNS server for a given domain⚑

dig soa +short

(https://unix.stackexchange.com/questions/165946/how-to-get-primary-dns-server-ip-of-specific-domain)

Get CAA register for a given domain⚑

dig caa

(https://security.stackexchange.com/questions/168133/how-can-i-look-up-a-certificate-authorities-caa-record-value)