The IP probing is an interesting methodology, although it would not work for GCE as VM IPs are entirely virtualized[0]. That said, the methodology&#x27;s biggest flaws (even with AWS as I see it) are that they don&#x27;t know the machine-count of individual racks (and this number can vary more than you might expect) and, more importantly, they don&#x27;t know the sizing on individual hosts.<p>Putting my original point differently: DigitalOcean may be big or small, but counting physical hosts is a terrible way to estimate its size. Better would be to count available cores and RAM, but of course those are much harder numbers to pin down as cloud providers tend to go to some lengths to abstract away the details of physical hosts.<p>[0]: Supporting live migration for individual VMs mostly necessitates that the IPs within a virtual network be meaningless w.r.t. the physical host locations -- also GCE advertises a &#x2F;32 subnet via DHCP and requests the guest route all packets to their &#x27;gateway&#x27;. Handling actual routing (to avoid a needless extra hop) is done via the Andromeda SDN.