Google GSuite Toolbox - Goolges DIG Tool

    Goolge GSuite Tools checks your name servers, A records, mail servers, SOA records for errors, consistency, accuracy and speed using several DNS tests. You can also flush your domain from Google's Recursive DNS Servers.
SolveDNS.com - SolveDNS is a great tool for troubleshooting DNS problems
    SolveDNS checks your name servers, A records, mail servers, SOA records for errors, consistency, accuracy and speed using several DNS tests. SolveDNS does not cache any test results, so you get a fresh report everytime you run the test for your domain names. If you would like to see more tests or have a question or a comment about a test result, please don't hesitate to use the email address in the footer.
intoDNS.com - intoDNS is a great tool for DNS Health Checking
    IntoDNS checks the health and configuration and provides DNS report and mail servers report. And provides suggestions to fix and improve them, with references to protocols’ official documentation.
digwebinterface.com - A great Web Interface for DIG with lot's of options
    This tool is not intended for automated lookups. Any other usage is in general welcome and free. To prevent abuse a CAPTCHA needs to be solved for every 100 lookups in a 24 hour period.
webdnstools.com - webdnstools.com
    Tools to check your entire domain DNS settings. Your mail or website not working? check here first!
kitterman.com - Kitterman SPF Record Checking tools
    Tools to check your DSN SPF records or Sender Policy Framework. SPF Testing
Squish.net - DNS Checker that checks the propagation of all root servers
    This is a free web-based service for DNS experts. Given a record name, and a record type, you will receive a report detailing all possible answers. This is accomplished by traversing the DNS tree from the root examining all possible routes that a client could travel, calculating percentage probabilities on the way. Note that this service does not consider your local cache, which may have information that is in conflict with the Internet DNS tree.
DNSStuff.com - DNS, Whois, Email Abuse Lookups, Email Blacklist Checking -
    This is a free web-based service for IT Professionals.
Zoneedit.com DNS Tools - Online DNS Check
    Zoneedit.com - A large DNS hosting company

Clustered Networks Design Services

Clustered Networks Inc.

Whether you have a network in your home or business, you need to make sure that it is secure and can be accessed remotely. It is essential that you have a complete look at your network from both internally and externally. We are all about Network Security!