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Type Private IP Public IP
Definition Used within local networks (home, office, etc.) Used to communicate over the internet
Routing Not routable on the internet Routable over the internet
IP Ranges 10.0.0.0 – 10.255.255.255 (10.0.0.0/8) 172.16.0.0 – 172.31.255.255 (172.16.0.0/12) 192.168.0.0 – 192.168.255.255 (192.168.0.0/16) Anything outside private ranges
Examples 10.232.22.11, 192.168.1.5, 172.16.50.3 8.8.8.8, 172.221.124.11, 193.32.44.55
Usage Internal communication (LAN, office, home) External communication (internet, websites, cloud services)

Private IP Ranges (Memorize These for Fast Identification)

Class Private IP Range CIDR Notation
Class A 10.0.0.0 – 10.255.255.255 10.0.0.0/8
Class B 172.16.0.0 – 172.31.255.255 172.16.0.0/12
Class C 192.168.0.0 – 192.168.255.255 192.168.0.0/16