Try:
DOMAIN=sometestdomain.com for server in $(dig +short ns $DOMAIN); do dig $DOMAIN type257 @$server; done
Make sure to change DOMAIN
to a domain you are seeing fail.
Try:
DOMAIN=sometestdomain.com for server in $(dig +short ns $DOMAIN); do dig $DOMAIN type257 @$server; done
Make sure to change DOMAIN
to a domain you are seeing fail.