Use this when the user wants an ip lookup, asks who owns this ip, needs the ip address owner or the whois ip details, wants the ip abuse contact, or needs an ip range lookup: it reads the five regional internet registries through RDAP and the reverse DNS (PTR) name, for one to twenty IPv4 or IPv6 addresses or CIDR ranges, and returns a CSV download for the batch. Limits: registry data shows the network holder and its country, not a street address or a person's location; some registries publish no abuse email; reverse DNS exists only when the network sets it. Do not use for an ip locator that claims a precise location, for looking up a domain name (that is a domain lookup), or for scanning a host.