Comparison Guide
Public IP vs Private IP
A public IP is routable on the public internet. A private IP is intended for local network use and is not directly routable across the open internet.
Public IP
Public IPs are used for internet-facing connectivity and are the kinds of addresses most public lookup tools can research.
Private IP
Private IPs are common on home, office, and internal networks, such as 192.168.x.x, 10.x.x.x, and 172.16.x.x through 172.31.x.x.
Practical takeaway
If a lookup tool is built for public network intelligence, it will usually be most useful on public IP space rather than RFC1918 private ranges.
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