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Subnet Calculator

Analyze IPv4
CIDR
You can also fill IP & Mask below to auto-sync.
IP (optional)
Mask (optional)
IP
192.168.1.10
Prefix / Mask
/24 • 255.255.255.0 • wildcard 0.0.0.255
Network / Broadcast
192.168.1.0 • 192.168.1.255
Usable range
192.168.1.1 — 192.168.1.254
Hosts
254(total: 256)
Class
C
IP bits
11000000 10101000 00000001 00001010
Mask bits
11111111 11111111 11111111 00000000
Yellow = network bits, Gray = host bits

Options

Display
Split
Max rows to render (for very large splits).

About the Subnet Calculator

Analyze an IPv4 address and mask to find its network, broadcast, usable range, and host counts. Split a base network into smaller equal-size subnets or aggregate multiple CIDR blocks into the smallest covering set.

  • /31 networks follow RFC 3021: both addresses are usable (point-to-point).
  • /32 represents a single host address.
  • Wildcard mask is simply the bitwise NOT of the subnet mask.
  • Aggregation merges overlapping/adjacent ranges and emits the minimal CIDR set.
Related Tools
About this collection

Each page is built around one practical task. Enter what you need, review the result, and use the actions provided by the tool.

What to expect

  • Inputs and results kept together
  • Layouts that adapt to smaller screens
  • Direct links for returning to a tool
  • No account needed for the listed utilities

Need something else? Request a tool.