I cannot vouch for the way your data is used by these sites, so be careful about entering sensitive information. NsInfo Pawel Wiecek's online DNS zone listing tool. Connectivity to this site appears very intermittent. For those times when DNS seems broken, here is the non-DNS link . ZoneCheck Online zone checking tool from NIC France .
Source code is available.
Perl A general system administration language which is needed to run many of the scripts listed here. Although Perl runs on most operating systems, some of the Perl scripts mentioned here rely on Unix-specific features and may not work on other systems. Information on which scripts work on systems other than Unix would be welcome. Perl module for doing DNS queries.