http://sjnrk23rmcl4ie5atmz664v7o7k5nkk4jh7mm6lor2n4hxz2tos3eyid.onion/c-dns-tests.html
This FQDN will be stored once, in the name-rdata table, and
a numeric index to an entry of this table will be used in the
message. For instance: // Server address
s.Write(cborInteger(0))
s.Write(cborInteger(2)) Here, we don't write the server IP address directly, we write an index to the table where the IP address is (2 is the second value of the
table, C-DNS indexes start at 1, read later about the value
zero).