---
service: i.root-servers.net
start-period: '2013-12-19T00:00:00Z'
end-period: '2013-12-20T00:00:07Z'
metric: unique-sources
  num-sources-ipv4: 2907016
  num-sources-ipv6: 79456
  num-sources-ipv6-aggregate: 49217