---
version: rssac002v4
service: d.root-servers.net
start-period: 2021-12-01T00:00:00Z
end-period: 2021-12-01T23:59:59Z
metric: unique-sources
num-sources-ipv4: 4473268
num-sources-ipv6: 711563
num-sources-ipv6-aggregate: 377671
