There's a random chance that a DNS request resolves correctly because not all nic-io domain servers are returning incorrect results. If you provide a high TTL o

There's a random chance that a DNS request resolves correctly because not all nic-io domain servers are returning incorrect results. If you provide a high TTL on your own records they will be cached for a longer time. Which has as a result that there will be less requests going to the nic-io servers. This still doesn't rule out bad responses. As far as I know there's no way to achieve that. However, it will make sure correct ones stay active longer. A high TTL on your NS records would be good as well for the same reason. On the SOA it shouldn't really matter.