UDevice vs Subnet Calculator

Make device debugging, network diagnostics, and security research more efficient. The app includes a rich set of professional tools covering network packet capture, request rewriting, SSH, local terminal, Python 3, file management, cookie editing, log analysis, JSON formatting, regular expressions, Ping, DNS lookup, Traceroute, port scanning, LAN scanning, and more. You can also view real-time device status and key system information, including CPU, system, network, memory, display, browser environment, and other device data, helping you quickly understand the current state of your device. Whether for development debugging, testing and troubleshooting, security research, or daily device management, everything can be done in one app.

Subnet Calculator puts essential subnet math in your pocket. Enter any IP and CIDR, and instantly see network address, broadcast, usable range, and more—ideal for admins, developers, and anyone planning or troubleshooting networks. ► Subnet Calculator • Support for IPv4 and IPv6; switch between them with a single tap. • Enter any IP address and adjust CIDR prefix length with a slider (/0 to /32 for IPv4, /0 to /128 for IPv6). • Instant results: network address, subnet mask, broadcast, first and last usable IP, host range, and total addresses. • IPv4: see address class (A/B/C/D/E), wildcard mask, and usable host count. • IPv6: see prefix length and total addresses in compact form (K, M, B). • Long-press any result to copy it to the clipboard. ► General • Dark and light theme. • Portrait-oriented layout for one-handed use. • No account required. Free to use, with ads to support development. Built for quick subnet planning, subnetting practice, and network design—handy for home labs, offices, and developers.