DNS observations
DNS observations lists recorded IPv4 and IPv6 answers for a domain or hostname. Enter a name such as example.com and inspect the addresses and available observation dates.
Use it to identify previously observed infrastructure and follow an address into Domains on an IP or IP overview. It is an index history, not a live DNS resolver or a complete record of every change.
A first/last observation is bounded by what Profundis collected. Missing intermediate answers, delayed indexing and partial results can leave gaps. Do not interpret the last recorded address as necessarily current.