dlint analyzes any DNS zone you specify, and reports any problems it finds by displaying errors and warnings. Then it descends recursively to examine all zones below the given one (this can be disabled with a command-line option).

You can run dlint on your own domains, or on somebody else's, because it uses the standard DNS network protocol. Dlint is very useful since most nameservers do no more than syntax-check your database files. Dlint's messages are very informative and suggest ways to fix the problems, not just complain about them.

FreeBSD:

Using the ports system:

cd /usr/ports/dns/dlint make install clean

pkg install dns/dlint