def find_nameservers(domain_name)
        domain_name = domain_name + '.' unless domain_name.match(/\.$/)

        nameserver_req = @resolver.getresources(domain_name, Resolv::DNS::Resource::IN::NS)
        if(nameserver_req.empty?)
          raise(I6::I6Error, 'Domain \'' + domain_name + '\' has no nameservers, unable to fetch NS records')
        end

        nameservers = []
        ip_addresses = []
        nameserver_req.each do |ns|
          rdata = ns.name.to_s
          nameservers << Dnsruby::RR.create(:name => domain_name, :type => 'NS', :ttl => 0, :domainname => rdata)
          @resolver.each_address(rdata) do |adr|
            ip_addresses << Dnsruby::RR.create(:name => rdata, :type => 'A', :ttl => 0, :address => adr.to_s)
          end
        end

        soa_req = @resolver.getresources(domain_name, Resolv::DNS::Resource::IN::SOA)
        unless soa_req.empty?
          primary_ns = nameservers.find { |ns| ns.domainname.to_s == soa_req[0].mname.to_s }
          if primary_ns
            nameservers.delete(primary_ns)
            nameservers.insert(0, primary_ns)
          end
        end
        nameservers + ip_addresses
      end