---
service: i.root-servers.net
start-period: '2013-09-21T00:00:00Z'
end-period: '2013-09-22T00:00:12Z'
metric: unique-sources
  num-sources-ipv4: 2369664
  num-sources-ipv6: 72885
  num-sources-ipv6-aggregate: 42365