---
version: rssac002v4
service: d.root-servers.net
start-period: 2021-12-31T00:00:00Z
end-period: 2021-12-31T23:59:59Z
metric: unique-sources
num-sources-ipv4: 4124333
num-sources-ipv6: 1189574
num-sources-ipv6-aggregate: 798421
