On Jan 29, 2015, at 10:37 PM, Robert Smith <rsdifu@gmail.com> wrote:

Good evening,

I'm trying to find/compile a list of name server software that the primary TLD servers use. I've found the root servers use BIND, with a few using NSD; is this about the same usage across TLD servers, as well?

Or perhaps some TLDs use particular appliances instead?

Besides BIND, NSD, Yadifa and Knot, you might find some Nominum servers in use by TLDs. You will also see that some TLDs use more than one name server:

host -c CH -t txt version.bind a.dns.br

version.bind descriptive text "NSD 3.2.17"

host -c CH -t txt version.bind c.dns.br

version.bind descriptive text "9.9.6"

Rubens