---
service: i.root-servers.net
start-period: '2013-07-21T00:00:00Z'
end-period: '2013-07-22T00:00:08Z'
metric: unique-sources
  num-sources-ipv4: 2505715
  num-sources-ipv6: 72961
  num-sources-ipv6-aggregate: 42971