IP Calculator: Subnet & CIDR

IP Calculator is a fast, no-nonsense IPv4 subnet calculator for network engineers, students and anyone configuring a network. Set an address and prefix with native iOS wheels: four octets (0-255) and a CIDR prefix (/0 to /32). Results recalculate live while the wheels spin, so you can explore subnets as fast as you can scroll. FOR ANY CIDR BLOCK YOU GET - Subnet mask - Number of hosts - Broadcast address - Wildcard mask - Usable host address range - Netmask in binary - IP classification: class A-E, public or private, plus special ranges like loopback, link-local and multicast CONVENIENT - Tap any result to copy it to the clipboard - Light and dark mode - Works on iPhone and iPad - VoiceOver support PRIVATE BY DESIGN Everything is calculated on your device. No account, no ads, no analytics, no network access. IP Calculator is open source: github.com/ntufar/IPCalculator