Have you checked out named-checkzone, as distributed with BIND? It's not a Perl solution, I know, but it and its output could be included in a Perl solution, and might be better than re-inventing the wheel. Google will turn up plenty of examples of the manpage if you don't have an installed copy handy.

In reply to Re: Validation of the data fields of a DNS zone file by Krellis
in thread Validation of the data fields of a DNS zone file by dwm042

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