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> You can't outsource DNS. It's one of the critical piece of networking that must be in every infrastructure.

This is simply not true. For resolvers, you can use your ISPs DNS servers or use a public resolver like Google DNS, OpenDNS, etc. For authoritative DNS there are plenty of hosted (outsourced) offerings like Route53, Dyn, Google Cloud DNS, etc.

This may not work for sufficiently complex organizations, but in my ~20 person SaaS company we have zero DNS servers and it works just fine. We use our ISP's resolvers for client lookups, and Google Cloud DNS for authoritative DNS.




As I said. It's a simplification. I really don't (and can't) get into a long explanation here about how to run a complex DNS infrastructure spanning multiple continents and datacenters ^^

Thing is. You gotta to run your own DNS since the moment you want your own DNS names. Good for you if a simple external DNS service is enough for you, a single 20 people office is not comparable to what the websites mentioned are operating.




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