asergeyev

# All authority gluerecs by name:
dig +noall +authority $NAME @b.gtld-servers.net | sed -e 's/.*\s//' | xargs -n1 -I % bash -c 'dig +short $NAME @% | sed -e s/^/%\\t/'

# All authority gluerecs with glue IPs:
dig +noall +additional $NAME @b.gtld-servers.net | sed -e 's/.*\s//' | xargs -n1 -I % bash -c 'dig +short $NAME @% | sed -e s/^/%\\t/'

# All recs found with resolving every name to all known IPs
dig +noall +authority $NAME @b.gtld-servers.net | sed -e 's/.*\s//' |  xargs -n1 -I % dig +short NS $ZONE @%  | sort -u | xargs -n1 -I % bash -c 'dig +short A %; dig +short AAAA %' | sort -u | grep -v : |xargs -n1 -I % bash -c 'dig +short $NAME @% | sed -e s/^/%\\t/'

# For one above, find zone by name (not 100% good but works ok for basic things):