The Global DNS Tester returns

Warren GuyWarren Guy
4 June 2015

After a few months of downtime (sorry!), the DNS tester is back.

It no longer uses the full list of nameservers from, as it appears that someone is zmapping the entire IPv4 submitting every DNS server they find to the database (this was the cause of the downtime - my importer couldn't handle the large volume). Consequently the quality of data is now relatively poor and includes many dynamic addresses etc. For now I'm just using a subset of the servers (those that have been up reliably for at least several months), which should be good enough.

TAGS: SysAdmin, Global DNS Tester, DNS

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