Daily domain changes across all indexed zones. New domains appeared in a zone that day — flagged first appearance if we have never seen the domain before, or seen before if it returned after previously existing (e.g. re-registered). Removed domains dropped out of their zone. Moved domains stayed in the zone but changed their nameserver delegation.
The same daily changes for nameserver glue records; the badge shows the address family of the changed record.
The same daily changes for the addresses that nameserver glue points at. Only first-ever sightings are listed here: addresses we had never seen in any zone's glue before this day. The rest of the day's new addresses were already in our data and simply picked up another nameserver.