IP Subnet Calculator vs NetBits

Allows efficient calculation of IPv4 and IPv6 subnets. Ideal for networking professionals and enthusiasts, it simplifies subnetting tasks, providing an essential tool for network configuration and analysis.

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 • Network class (A–E) and address type: Private, Public, Loopback, Multicast, CGNAT and more • Binary representation of the address and mask Need to plan a network? Split it into subnets: • Equal parts — pick a subnet mask and see every subnet with its host range and broadcast address • By hosts (VLSM) — enter how many hosts each network needs, and NetBits gives each the smallest subnet that fits and shows the free space left 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 — Subnet splitting: equal parts or VLSM — Copy any value with a long press — Share the result or the list of subnets as text — Light and Dark mode — English and Russian PRIVACY NetBits works fully offline. No accounts, no analytics, no data collection — ever.