http://catallarchy.net/
Testing at DNSstuff.com yields mostly D's and F's. I have never gotten above a C. Here is the outcome:
QUOTE
Looking up at ns18.hostony.net.... Reports no A records (may be a referral). 39ms.
Looking up at ns19.hostony.net.... Reports 1 A record(s). 37ms.
Average of all 2 nameservers: 38ms (plus 1632ms overhead).
Score: F
Took off 3 points for ".net" TLD (extra lookups may be required to find the parent servers).
Took off 8 points for having no glue at a parent server [adds 2 extra packets to lookup].
Took off 8 points for having no glue at a parent server [adds 2 extra packets to lookup].
Took off 8 points for having no glue at a parent server [adds 2 extra packets to lookup].
Took off 8 points for having no glue at a parent server [adds 2 extra packets to lookup].
Took off 20 points since ns18.hostony.net does not respond authoritatively (can cause unexpected responses and add delays).
Note: The 1632ms overhead is the time it takes to get your NS records from the parent servers, and indicates a worst-case scenario (normally, the resolving DNS server would have the common parent server entries cached, and would know the parent server(s) that were responding most quickly). The best times since the last time this web server was last restarted are: 14ms average response, plus 92ms overhead. Note that these times are from a server located in the United States; if most of the people using your DNS are outside of the United States, your actual results may be better than what is shown here. A rating of 'B' or higher is generally good. This tool is designed to make an educated guess about speed, and to point out potential factors that may reduce the DNS speed, and it is not perfect.
Looking up at ns19.hostony.net.... Reports 1 A record(s). 37ms.
Average of all 2 nameservers: 38ms (plus 1632ms overhead).
Score: F
Took off 3 points for ".net" TLD (extra lookups may be required to find the parent servers).
Took off 8 points for having no glue at a parent server [adds 2 extra packets to lookup].
Took off 8 points for having no glue at a parent server [adds 2 extra packets to lookup].
Took off 8 points for having no glue at a parent server [adds 2 extra packets to lookup].
Took off 8 points for having no glue at a parent server [adds 2 extra packets to lookup].
Took off 20 points since ns18.hostony.net does not respond authoritatively (can cause unexpected responses and add delays).
Note: The 1632ms overhead is the time it takes to get your NS records from the parent servers, and indicates a worst-case scenario (normally, the resolving DNS server would have the common parent server entries cached, and would know the parent server(s) that were responding most quickly). The best times since the last time this web server was last restarted are: 14ms average response, plus 92ms overhead. Note that these times are from a server located in the United States; if most of the people using your DNS are outside of the United States, your actual results may be better than what is shown here. A rating of 'B' or higher is generally good. This tool is designed to make an educated guess about speed, and to point out potential factors that may reduce the DNS speed, and it is not perfect.