Zonemaster will save the history from prior scans, useful for troubleshooting problems. Zonemaster can also be used to test an undelegated domain (for example, prior to registering it). It will run a number of health checks on a domain, including DNSSEC but also basic checks for accessibility, consistency, delegation and basic security.

Zonemaster - Zonemaster, developed by IIS and AFNIC, is a web-based zone checker.

Useful guides, books, and how-to articles.The tools are sorted into four categories: Send any suggestions or corrections to web-request at isc dot org. We welcome notifications for additions, deletions, or broken links please let us know if something we are linking to is inaccurate. Some of the information is quite old, but may still be generally useful. We have not tried all of these many of them have simply been added on the suggestion of some of our users, so we can’t make any specific claims about suitability or quality. Please note that it is your responsibility to check the licensing terms of any software you download. Please visit our ISC DHCP tools and Kea/IPv6 tools pages if those are relevant to your needs. These are a few of the DNS-related tools, websites, and books we have heard of.

For windows download Dig Out!