What is Public vs private IP address?
Also: private ip · public ip
A public IP address is globally routable and visible to every site you visit; a private IP (like 192.168.1.1 or 10.0.0.0/8) exists only inside a local network and can't be reached from the internet. Your router has a public IP on the outside and hands out private IPs to your devices via NAT.
Private ranges are defined by RFC 1918 (10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16). They are reused on every LAN on earth, so they can't be looked up or geolocated from the public internet.
Carrier-grade NAT adds a fourth shared range, 100.64.0.0/10, between subscribers and their ISP.
How IPLogs handles it
IPLogs recognizes private, loopback, link-local, CGNAT, and reserved ranges and explains them instead of returning a meaningless verdict.