NetBits: IP Calculator

Now with CIDR input, binary view, Dark Mode and Russian localization. Fast, offline subnet math — no ads, no tracking.

NetBits is a fast, no-nonsense IP subnet calculator.

Enter an IPv4 address and subnet mask — or just type CIDR notation like 192.168.1.10/24 — and instantly get:

• Network and broadcast address • Wildcard mask • Usable host range (min / max) • Number of usable hosts • Binary representation of the address and mask

Built for network engineers, sysadmins, students, and anyone who needs quick, accurate subnet math without ads or clutter.

FEATURES — CIDR notation input — Binary address/mask view — Copy any value with a long press — Light and Dark mode — English and Russian

PRIVACY NetBits works fully offline. No accounts, no analytics, no data collection — ever.