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"Here's where things start to go off the rails: what this means is that all of the DPRK's national network is non-routable IP space. You heard me; they're treating their entire country like some small to medium business might treat their corporate office," Hansen wrote in a blog post detailing his findings. "The entire country of North Korea is sitting on one class A network (16,777,216 addresses). I was always under the impression they were just pretending that they owned large blocks of public IP space from a networking perspective, blocking everything and selectively turning on outbound traffic via access control lists."